100 Most Repeated MDCAT MCQs

Top 50 — highest frequency

The 50 questions most likely to reappear, ranked by how many past papers they recur in.

1. 1

   Repeated 13×Support and Movement

   The muscles attached to the bones are

   • AVoluntary and smooth
   • BInvoluntary and smooth
   • CVoluntary and striated✓
   • DInvoluntary and striated
   • ESmooth and striated

   Explanation

   Voluntary muscles are under conscious control, allowing us to move our bodies intentionally. Striated muscles have a striped appearance under a microscope due to the organization of their contractile proteins, giving them the name "striated." These muscles are also known as skeletal muscles and are responsible for body movements.

   Appeared in past papers: 2010, 2011

2. 2

   Repeated 11×Cell Structure and Function

   The finger like infoldings, which are formed by inner membrane of mitochondria, are called:

   • ARibosomes
   • BMatrix
   • CPorin
   • DCristae✓

   Explanation

   The correct answer is Cristae, which are the finger-like infoldings of the inner membrane of mitochondria. These structures are critical for the mitochondria's function, as they increase the surface area available for the electron transport chain, thereby enhancing ATP production.In contrast, Ribosomes are involved in protein synthesis and do not relate to mitochondrial structure. The Matrix refers to the space within the mitochondria, but it does not describe any infoldings. Porin is a type of protein that allows for the transport of substances across membranes and is not an infolding structu

   Appeared in past papers: 2019

3. 3

   Repeated 11×Cell Cycle

   Cell death due to tissue damage is called:

   • ANecrosis✓
   • BMetastasis
   • CApoptosis
   • DEpistasis

   Explanation

   [A] Necrosis is the death of a body tissue,occurring when too little blood flows to the tissue.[B]Metastasis means that cancer has spread to different parts of body[C] Apoptosis the process of programmed cell death[D] Epistasis is a circumstance where the expression of one gene is modified by expression of one or more gene

   Appeared in past papers: 2010, 2011, 2013, 2023

4. 4

   Repeated 10×Circular Motion & Momentum

   An object is moving along a circular path of radius 4m. What will be its angular displacement if it moves 14 m on this circular path?

   • A5.0 radians
   • B3.5 radians✓
   • C4.5 radians
   • D5.5 radians

   Explanation

   Arc length = Radius x Angular displacementS = rθKeeping Arc length as 14m and radius as 4m, we get angular displacement as 3.5 radians.

   Appeared in past papers: 2019

5. 5

   Repeated 9×Cell Structure and Function

   The ability to distinguish between two separate points/objects is:

   • AMagnification
   • BFractionation
   • CCentrifugation
   • DResolution✓

   Explanation

   Scientists think of resolution as the ability to tell that two objects that are very close together are distinct objects rather than just one.Fractionation is a separation process in which a certain quantity of a mixture (gas, solid, liquid, enzymes, suspension, or isotope) is divided during a phase transition, into a number of smaller quantities (fractions) in which the composition varies according to a gradient.Centrifugation is a technique used for the separation of particles from a solution according to their size, shape, density, viscosity of the medium and rotor speed. The particles are

   Appeared in past papers: 2018

6. 6

   Repeated 9×Coordination and Control

   The autonomic nervous system controls all of the following activities except:

   • ADigestion of food
   • BHeart beat
   • CContraction of pupil of eye
   • DThought✓
   • EBreathing rate

   Explanation

   The autonomic nervous system does not directly control thought processes. Thought is primarily regulated by the central nervous system, which includes the brain and spinal cord. While the autonomic nervous system can be influenced by certain thought patterns, such as stress or relaxation, it does not directly control the generation or content of thoughts.

   Appeared in past papers: 2011, 2014, 2015

7. 7

   Repeated 9×Variation and Genetics

   A woman with normal colour vision, whose father was red green colour blind, married a red green colour blind man. What is the probability of her born child being red green colour blind?

   • A1.0
   • B0.75
   • C0.50✓
   • D0.25

   Explanation

   Males have 1 X chromosome and 1 Y chromosome, and females have 2 X chromosomes. The genes that can give you red-green colour blindness are passed down on the X chromosome.The woman’s father is red-green colour blind. Since the woman got one of her X chromosomes from her father this means that she is a carrier. As it can be seen from the table the probability of having a colourblind child is 0.5%

   Appeared in past papers: 2017

8. 8

   Repeated 9×Coordination and Control

   The absorption and use of calcium are regulated by:

   • AParathormone✓
   • BAdrenaline
   • CThyroxin
   • DThiamin
   • EProlactin

   Explanation

   Circulating parathyroid hormone targets the distal convoluted tubule and collecting duct, directly increasing calcium reabsorption.

   Appeared in past papers: 2015

9. 9

   Repeated 9×Chemical Bonding

   Linear combination of atomic orbitals (LCAO) results in the formation of:

   • ASigma bond
   • BPi bond
   • CBonding molecular orbitals only
   • DBonding and antibonding molecular orbitals✓
   • EAll of these options

   Explanation

   According to Molecular Orbital Theory (MOT), two atomic orbitals overlap resulting in the formation of molecular orbitals. Number of atomic orbitals overlapping together is equal to the molecular orbital formed. The two atomic orbital thus formed by LCAO (linear combination of atomic orbital) in the same phase or in the different phase are known as Bonding Molecular Orbital (BMO) and Antibonding Molecular Orbitals (ABMO) respectively.

   Appeared in past papers: 2010

10. 10

    Repeated 9×Atomic Structure

    The maximum number of electrons that an orbital can accommodate is/are:

    • A0
    • B1
    • C2✓
    • D3
    • E4

    Explanation

    The maximum number of electrons in a single orbital is two. The maximum number of electrons an orbital can accommodate is 2. As in an orbital two electrons can never have the same values of all 4 quantum no.s according to Pauli’s exclusion principle. So to follow this rule, an orbital can accommodate 2 electrons only.

    Appeared in past papers: 2009, 2010

11. 11

    Repeated 9×Chemical Bonding

    If the difference between electronegativity values between two atoms is less than 1.7, the bond is necessarily.

    • ACovalent✓
    • BIonic
    • CPolar covalent
    • DMetallic

    Explanation

    This is the correct answer. When the electronegativity difference between two atoms is less than 1.7, the bond formed between them is generally considered covalent. In a covalent bond, the atoms share electrons to achieve a stable electron configuration.

    Appeared in past papers: 2016, 2023

12. 12

    Repeated 9×S and p Block Elements

    Lithium and beryllium are unique in such a way that they have higher charge densities which produce strong polarizing effects due to:

    • ASmall size✓
    • BHigh electronegativity
    • CLow ionization energy
    • DLarge atomic radius

    Explanation

    This is the correct answer. Lithium and beryllium have smaller atomic radii compared to other elements in their respective groups. This small size combined with their relatively high positive charges (Li+ and Be2+) results in a high charge density. This high charge density allows them to exert strong polarizing effects on the electron clouds of neighboring atoms or ions, leading to the formation of covalent bonds or polar covalent bonds.Therefore, the unique properties of lithium and beryllium, including their strong polarizing effects, are primarily due to their small size.

    Appeared in past papers: 2018, 2023

13. 13

    Repeated 9×Circular Motion & Momentum

    If the body is rotating with uniform angular velocity, then its torque is:

    • AZero✓
    • BClockwise
    • CMaximum
    • DRemains the same

    Explanation

    Explanation:If the body is rotating with uniform angular velocity, its angular momentum remains constant, and therefore there is no change in its rotational motion. Since torque is the rate of change of angular momentum, the torque acting on the body is zero. This option is not correct because if there is a clockwise torque acting on the body, it will cause the angular velocity to change, which is not the case when the body is rotating with uniform angular velocity. This option is also incorrect because the maximum torque occurs when the force is perpendicular to the axis of rotation.This opti

    Appeared in past papers: 2009, 2016

14. 14

    Repeated 9×Logical Reasoning

    The Emporium Mall has more stores than the Pakages Mall.The Amanah Mall has fewer stores than the Pakages Mall.The Emporium Mall has more stores than the Amanah Mall.If the first two statements are true, the third statement is

    • ATrue✓
    • BFALSE
    • CUncertain
    • DNone of these

    Explanation

    Explanation From the first two statements, you know that the Emporium mall has the most stores, so the Emporium Mall would have more stores than the packages Mall.

15. 15

    Repeated 9×Logical Reasoning

    STATEMENTS:I. The dialogue between Jinnah and Gandhi failed.Il. Indian National Congress and Muslim League tried to join hands, so they will be united.

    • AStatement I is the cause and statement II is its effect.
    • BStatement II is the cause and statement I is its effect.
    • CBoth statements I and II are independent causes
    • DBoth statements I and II are the effects of independent cause.✓

    Explanation

    Gandhi and Jinnah were unable to reach a decision regarding Pakistan hence the dialogue failed. In order to show a united front to the British as they believe that would help them achieve independence INC and ML tried to join hands(work together). Thus both these statements are effects of independent causes.

16. 16

    Repeated 8×Cell Structure and Function

    The structure present in a eukaryotic cell but absent in prokaryotic cells is:

    • ANucleus✓
    • BDNA
    • CRibosomes
    • DCell surface membrane

    Explanation

    The correct answer is the nucleus. It is a hallmark of eukaryotic cells, encapsulating the cell's genetic material within a distinct, membrane-bound structure. Prokaryotic cells lack this feature; their genetic material is dispersed within the cell without a surrounding nuclear membrane. The other options are common to both cell types: DNA is present in all cells as the genetic blueprint, ribosomes are universal sites of protein synthesis, and the cell surface membrane is fundamental to maintaining cellular integrity and homeostasis.

    Appeared in past papers: 2019

17. 17

    Repeated 8×Gaseous Exchange

    During breathing, air from pharynx enters to:

    • ATrachea✓
    • BBronchioles
    • CAlveoli
    • DBronchi

    Explanation

    When you inhale through your nose or mouth, air travels down your pharynx (back of your throat), passes through your larynx (voice box) and into your trachea (windpipe). Your trachea is divided into two air passages called bronchial tubes. One bronchial tube leads to your left lung, the other to your right lung.

    Appeared in past papers: 2018

18. 18

    Repeated 8×Biotechnology

    Which kind of therapy was given in 1990 to a four­ year­ girl with Adenosine Deaminase (ADA) enzyme deficiency?

    • AGene therapy✓
    • BChemotherapy
    • CImmunotherapy
    • DRadiation therapy

    Explanation

    Gene therapy was the treatment given in 1990 to a four-year-old girl with Adenosine Deaminase (ADA) deficiency. This type of therapy focuses on correcting genetic problems by inserting genes into a patient's cells. In the case of ADA deficiency, gene therapy was used to insert a healthy copy of the ADA gene into the child's cells to compensate for the defective gene, thereby restoring the function of the enzyme. On the other hand, chemotherapy, immunotherapy, and radiation therapy are primarily used for cancer treatment and are not applicable for treating genetic enzyme deficiencies.

19. 19

    Repeated 8×Support and Movement

    What do we call the cell surface membrane of a muscle fibre?

    • ASarcolemma✓
    • BPlasma membrane
    • CSarcoplasm
    • DMyofibrils

    Explanation

    The correct answer is Sarcolemma. The sarcolemma is the specialized cell membrane that surrounds a muscle fiber. It is crucial for communication between the nervous system and the muscle fiber, allowing the initiation of muscle contraction through electrical signal transmission. The term 'sarco-' denotes its association with muscle cells, differentiating it from the general plasma membrane found in all cell types. Option B, the 'Plasma membrane', refers to the cell membrane in general terms and does not specify its role in muscle cells. Option C, 'Sarcoplasm', is the cytoplasmic content of the

    Appeared in past papers: 2020, 2023

20. 20

    Repeated 8×Biological Molecules

    In which of the following is the organic compound COOH (carboxyl) group found? (I) Carbohydrate (II) Lipid (III) Protein

    • AI only
    • BII only
    • CI and II only
    • DII and III only✓
    • EI , II and III

    Explanation

    Carboxyl groups are commonly found in amino acids, fatty acids, and other biomolecules. Whereas carbohydrates only contain atoms of carbon hydrogen and oxygen they don't have any functional group.

    Appeared in past papers: 2015

21. 21

    Repeated 8×Coordination and Control

    Gigantism in human beings is caused due to over secretion of:

    • AThyrotropin
    • BCorticotropin
    • CSomatotropin✓
    • DProlactin

    Explanation

    Gigantism occurs when a child’s pituitary gland makes too much growth hormone, which is also known as somatotropin. Corticotropin-releasing hormone (CRH), also called corticotropin-releasing factor (CRF), is a peptide hormone that activates the synthesis and release of adrenocorticotropic hormone (ACTH) from the pituitary gland. In this way, CRH affects our response to stress, addiction and depression, amongst others. Prolactin is a hormone made by the pituitary gland, a small gland at the base of the brain. Prolactin causes the breasts to grow and make milk during pregnancy and after birth. T

    Appeared in past papers: 2017

22. 22

    Repeated 8×Miscellaneous

    Alcohol in which carbon atom bonded to OH group is further attached with three alkyl group is:

    • ATertiary alcohol✓
    • BPrimary alcohol
    • CAromatic alcohol
    • DSecondary alcohol

    Explanation

    A tertiary (3°) alcohol is one in which the carbon atom with the OH group is attached to three other carbon atoms. Its general formula is R3COH Primary alcohols are those alcohols where the carbon atom of the hydroxyl group (OH) is attached to only one single alkyl group. The aromatic alcohols or aryl-alcohols are a class of chemical compounds containing a hydroxyl group (—OH) bonded directly to an aromatic hydrocarbon group. A secondary alcohol is a compound in which a hydroxyl group( ‒OH) is attached to a saturated carbon atom which has two other carbon atoms attached to it.

    Appeared in past papers: 2018

23. 23

    Repeated 8×Thermochemistry

    Which enthalpy change is relevant in the following process Na(s) → Na (g) ΔH = +107

    • AEnthalpy of atomization✓
    • BEnthalpy of fusion
    • CEnthalpy of vaporization
    • DEnthalpy of formation

    Explanation

    Option A, enthalpy of atomization, is the energy required to completely separate all the atoms in a chemical substance. The separated atoms are in a gaseous state and get separated from the corresponding substance in its standard state. Sodium is solid in its standard state, and after atomization, the atoms are in their gaseous state. Hence, this is the correct answer. Option B is the enthalpy change when a solid substance melts into a liquid. Here, the state change is from a solid to a gas, no liquid state involved. Option C is the enthalpy change when a liquid is vaporized into a gas. Here,

    Appeared in past papers: 2019

24. 24

    Repeated 8×Thermochemistry

    Reaction of water with quicklime results in the rise in the temperature of the system. Using the concept of an energy change, indicates the nature of the reaction?

    • AEndothermic Reaction
    • BNon-Spontaneous Reaction
    • CThird Order Reaction
    • DExothermic Reaction✓

    Explanation

    Calcium oxide reacts with water to form calcium hydroxide, also called slaked lime. Here are the for this reaction: Calcium oxide + water → calcium hydroxide CaO+H2O → Ca(OH)2 A lot of heat is produced in the reaction, which may even cause the water to boil. Hence it is a combination reaction as well as exothermic reaction.

    Appeared in past papers: 2018

25. 25

    Repeated 8×Chemical Bonding

    Which option shows all the molecules with bond angle 109.5 degrees:

    • ACH4 , NH4+ , PH3
    • BSiCl4 , H2O , BeCl2
    • CSiCl4 , NH4+ , CH4✓
    • DCH4 , CCl4 , NH3

    Explanation

    Since all molecules stated in option C are tetrahedral in shape, where a central atom is located at the center with four substituents that are located at the corners of a tetrahedron. Hence they all have bond angles that are 109.5 degrees.

    Appeared in past papers: 2018

26. 26

    Repeated 8×Aldehydes and Ketones

    Select the reagent X from the following choices for this conversion:

    • AAcidified Potassium hydroxide
    • BAcidified Potassium dichromate (VI)✓
    • CAcidified Phosphoric acid
    • DAcidified Oxalic acid

    Explanation

    The reaction above is oxidation of a secondary alcohol into a ketone. As such, an oxidizing agent must be chosen for reagent X. Among the options, 'Potassium dichromate (VI)' is an oxidizing agent so, the correct option is B. Another answer could be 'potassium manganate (VII)', but it is not mentioned in any of the options. The other options do not oxidize alcohols.

    Appeared in past papers: 2019

27. 27

    Repeated 8×Chemical Bonding

    The raindrop acquires a spherical shape and ink spread over blotting paper due to:

    • ASurface tension✓
    • BAdhesive forces
    • CViscosity
    • DPolarity
    • ELatent heat of vaporization

    Explanation

    A raindrop falling through the atmosphere forms a roughly spherical structure due to the surface tension of water. This surface tension is the “skin” of a body of water that makes the molecules stick together. The cause is the weak hydrogen bonds that occur between water molecules.

    Appeared in past papers: 2010

28. 28

    Repeated 8×Acids, Bases and Salts

    Which of the following statements about H2S is false:

    • AIt is a covalent compound
    • BIt is a gas with a bad smell
    • CIt is a strong reducing agent
    • DIt is a molecule which is non linear
    • EIt is a weak base in water✓

    Explanation

    H2S is a weak acid, donating two hydrogen ions in neutralization reactions, forming HS- and S-2 ions, not a weak base. Hence option E is the correct answer.H2S is a covalent compound with a rotten egg smell. It is a strong reducing agent with a bent (non-linear) geometry.

    Appeared in past papers: 2010, 2017

29. 29

    Repeated 8×Alcohols, Phenols and Ether

    Primary Alcohol is produced by reactions of Grignard's reagent with _ followed by hydrolysis in an acidic medium.

    • ACarbon dioxide
    • BFormaldehyde✓
    • CAcetaldehyde
    • DKetone
    • EMethyl chloride

    Explanation

    The Grignard Reaction involves the addition of an organomagnesium halide (Grignard reagent) to carbonyl compounds. When Grignard reagents react with formaldehyde, a primary alcohol is produced upon hydrolysis in an acidic medium. Formaldehyde is unique as it is the simplest aldehyde, thus allowing the formation of a primary alcohol. Other aldehydes and ketones lead to secondary and tertiary alcohols, respectively. Carbon dioxide reacts with Grignard reagents to form carboxylic acids, not alcohols, and methyl chloride does not react to form an alcohol.

    Appeared in past papers: 2011

30. 30

    Repeated 8×Miscellaneous

    The total energy of a hydrogen atom in its ground state is:

    • AZero
    • BNegative✓
    • CPositive
    • DNone of the above

    Explanation

    The total energy of a hydrogen atom in its ground state can be calculated using the Schrödinger equation, which is a fundamental equation in quantum mechanics. The ground state of a hydrogen atom refers to the lowest energy state that the electron can occupy. In the Bohr model of the hydrogen atom, the ground state energy can be expressed as: E = -13.6 eV / n2 Where: E is the energy of the ground state in electron volts (eV), n is the principal quantum number, which is equal to 1 for the ground state. Plugging in the values: E = -13.6 eV / (12) = -13.6 eV So, the total energy of a hydrogen ato

    Appeared in past papers: 2023

31. 31

    Repeated 8×Nuclear Physics

    In relation, which quantity is represented by λ?

    • ADecay constant✓
    • BHalf life
    • CActivity
    • DWavelength

    Explanation

    Explanation is given below.T1/2 represents the 'half-life' with 'T', implying the quantity has something to do with time, and '1/2' representing 'half'.

    Appeared in past papers: 2019

32. 32

    Repeated 8×Work, Power & Energy

    A particle, carrying a charge of 5e, falls through a potential difference of 25 V. What would be energy acquired by the particle in ‘J’.

    • A1.6 x 10-19 J
    • B125 J
    • C125 x 10-19 J
    • D125 x 1.6 x 10-19 J✓

    Explanation

    Electric Potential Energy = Electric Potential x Charge Charge = 5 x 1.6 x 10-19 C Electric Potential Energy = 25V x (5 x 1.6 x 10-19) C This could be manipulated to give us (125 x 1.6 x 10-19) J, which is Option D.

    Appeared in past papers: 2019

33. 33

    Repeated 8×Circular Motion & Momentum

    Which of the following gives the relationship between linear velocity and angular velocity?

    • Av = rω✓
    • Bv = rθ
    • Cv=sω
    • Dv=sθ

    Explanation

    The greater the rotation angle in a given amount of time, the greater the angular velocity. Angular velocity (w) is analogous to linear velocity (v).We can write the relationship between linear velocity and angular velocity in two different ways: v=rw or w=v/r.The difference between these two quantities must also be known;

    Appeared in past papers: 2018

34. 34

    Repeated 8×Alternating Current

    What is the instantaneous power dissipated through a resistor of resistance 10 ohm if it is connected to an AC source of frequency 15 Hz at 1/180 sec if peak value is 20 V?

    • A10 W✓
    • B100 W
    • C40 W
    • DCannot be determined

    Explanation

    UsingVo = V sin(2𝜋ft) = 20 x sin (2𝜋 x 15 x 1/180) = 10 VUsingP = v2/ R = 102 / 10 = 10 W

    Appeared in past papers: 2018

35. 35

    Repeated 8×Atomic Spectra

    What is the number of spectral series in the hydrogen spectrum?

    • AFour
    • BThree
    • CFive✓
    • DOne

    Explanation

    The five spectral series are Lyman, Balmer, Paschen, Brackett and Pfund. In the Lyman series, the electron falls back to n = 1. The spectral lines obtained are in the UV region of the electromagnetic spectrum. In the Balmer series, the electron falls back to n = 2, and the spectral lines obtained are in the visible region of the EM spectrum. Paschen, Brackett, and Pfund spectral lines are obtained in the Infrared region of the EM spectrum.

36. 36

    Repeated 8×Magnetism and Electromagnetic Induction

    Magnetic force on a charged particle is:

    • AQvBl
    • BNone of these
    • CQvB cosθ
    • DQvB sinθ✓

    Explanation

    When a charge moves through a magnetic field, a force is applied on it which is given by:F = QvB sinθQvBl is the motional EMF produced when a conductor moves through a static magnetic field.

37. 37

    Repeated 8×Atomic Spectra

    A set of Atoms in an excited state decays:

    • AIn any general state with lower energy✓
    • BIn any state when excited by electric field
    • CIn any state when excited by magnetic field
    • DNone of these options are correct

    Explanation

    As we know, atoms are stable in the ground state, when they move to another level by gaining energy, they get excited and are ready to lose energy to get back to the ground state. This shows, generally excited state atoms decay to any of the states with lower energy. Hence,the correct option is A in any general state with lower energy which is more stable than the excited state.

38. 38

    Repeated 8×Miscellaneous

    The emission of electrons from a metal surface when exposed to light of suitable frequency is known as:

    • ACompton's effect
    • BPhotoelectric effect✓
    • CCoulomb's law
    • DFaraday's law
    • EOhm's law

    Explanation

    Explanation: photoelectric effect, is a phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. The effect is often defined as the ejection of electrons from a metal plate when light falls on it.

    Appeared in past papers: 2014, 2015

39. 39

    Repeated 7×Biological Molecules

    Which of the following holds the alpha helix of protein in its place:

    • AR group
    • BDisulfide bond
    • CAmino group
    • DHydrogen bond✓

    Explanation

    The α-helix is a right-handed helix with the peptide bonds present on the inside and the side chains extending outward. It is stabilized by the regular formation of hydrogen bonds parallel to the axis of the helix; they are formed between the amino and carbonyl groups of every fourth peptide bond.

    Appeared in past papers: 2018

40. 40

    Repeated 7×Homeostasis

    The external solution having more concentration than the cell sap is known:

    • AHypertonic solution✓
    • BHypotonic solution
    • CIsotonic solution
    • DNone of these

    Explanation

    The correct answer is a hypertonic solution. In osmoregulation, when a cell is placed in a hypertonic solution, the external environment has a higher concentration of solutes compared to the inside of the cell. This concentration difference causes water to move out of the cell through osmosis, leading to a decrease in cell volume and potential plasmolysis. Conversely, a hypotonic solution would cause water to move into the cell, and an isotonic solution would result in no net water movement. None of these is incorrect because the correct term for a solution with higher solute concentration tha

41. 41

    Repeated 7×Kingdom Prokaryote

    Rod-shaped bacteria are known as:

    • ACocci
    • BBacilli✓
    • CSpirilla
    • DNone of these

    Explanation

    Bacteria are classified according to their shape, or morphology. Spherical bacteria are known as cocci, rod-shaped bacteria are bacilli, and spiral-shaped bacteria are spirilla.

    Appeared in past papers: 2018

42. 42

    Repeated 7×Biotechnology

    What forms the basis of DNA fingerprinting?

    • AThe relative proportions of purines and pyrimidines in DNA
    • BThe relative difference in the DNA occurrence in blood, skin, and saliva
    • CThe relative amount of DNA in the ridges and grooves of the fingerprints
    • DSatellite DNA occurring as highly repeated, short DNA segments✓

    Explanation

    DNA fingerprinting is a technique of determining nucleotide sequences of certain areas of DNA which are unique to each individual. The difference of about 0.1% or 3 × 106 base pairs (out of 3 × 10 9 bp) provides individuality to each human being. The human genome possesses numerous small noncoding but inheritable sequences of bases that are repeated many times. These sequences occur near telomere, centromeres, Y chromosome, and heterochromatic area. The area with the same sequence of bases repeated several times is called repetitive DNA. It is separated as a satellite from the bulk DNA during

43. 43

    Repeated 7×Coordination and Control

    Piriformis syndrome is associated with which of the following disorder:

    • AArthritis
    • BSciatica✓
    • CSpondylosis
    • DDisc slip

    Explanation

    Piriformis syndrome is a condition where the piriformis muscle in the buttocks compresses the sciatic nerve, leading to sciatica symptoms such as pain, numbness, and tingling in the lower limbs. While a slipped disc can also cause sciatica, piriformis syndrome is specifically related to muscle compression rather than disc issues. Arthritis and spondylosis, on the other hand, are primarily joint and spinal disorders that do not typically involve the piriformis muscle or cause sciatica directly.

    Appeared in past papers: 2018

44. 44

    Repeated 7×Support and Movement

    Which of the following bones are present in the palm of the hand:

    • ACarpals
    • BMetacarpals✓
    • CPhalanges
    • DTarsal
    • ERadius

    Explanation

    The human forelimbs each consist of 30 bones: The humerus, which forms a ball and socket joint with the scapula, and two long parallel bones, the radius and ulna, at its distal end. The radius and ulna join the wrist with eight small carpal bones, which articulate with five metacarpals of the palm. From the palm extend the fingers containing 14 small bones called phalanges, arranged in 5 rows, one row in each finger. The relevant detail for this question is that the bones of the palm are called metacarpals, hence option B is correct.

    Appeared in past papers: 2010

45. 45

    Repeated 7×Coordination and Control

    How many meninges cover the human brain?

    • A5
    • B4
    • C3✓
    • D2
    • E1

    Explanation

    There are three layers of meninges around the brain and spinal cord. The outer layer, the dura mater, is tough, white fibrous connective tissue. The middle layer of meninges is the arachnoid, a thin layer resembling a cobweb with numerous threadlike strands attaching it to the innermost layer.

    Appeared in past papers: 2014

46. 46

    Repeated 7×Miscellaneous

    Which of the following diseases is sexually transmitted?

    • ATuberculosis
    • BAIDS✓
    • CDengue Fever
    • DCholera

    Explanation

    Acquired immunodeficiency syndrome (AIDS) is a chronic, potentially life-threatening condition caused by the human immunodeficiency virus (HIV). By damaging your immune system, HIV interferes with your body's ability to fight infection and disease. You can get HIV from contact with infected blood, semen, or vaginal fluids. Most people get the virus by having unprotected sex with someone who has HIV. Another common way of getting it is by sharing drug needles with someone who is infected with HIV. Hence, Option B is correct. Tuberculosis is caused by bacteria that spread from person to person t

    Appeared in past papers: 2020

47. 47

    Repeated 7×Enzymes

    Some enzymes require the presence of a non protein molecule to behave catalytically. An enzyme devoid of this molecule is called a(n):

    • AHoloenzyme
    • BApoenzyme✓
    • CCoenzyme
    • DZymoenzyme

    Explanation

    Enzyme with a non-proteinous part is called Holoenzyme; without that non-proteinous part, it is called Apoenzyme.

48. 48

    Repeated 7×Transport

    Regarding structure of the human heart, Chordae tendinae are present in:

    • AAtria
    • BPulmonary valve
    • CVentricles✓
    • DAortic valve

    Explanation

    Chordae tendineae (or simply chordae) are fibrous cords or tendons that are present in the heart to anchor the atrioventricular (AV) valves (specifically, the tricuspid and bicuspid/mitral valves) to the papillary muscles located in the ventricles. This prevents the valves from inverting into the atria when the ventricles contract and helps in maintaining proper valve function. Therefore, the correct location for chordae tendineae is Ventricles

    Appeared in past papers: 2020, 2023

49. 49

    Repeated 7×Carboxylic Acids and its Derivatives

    Which one of the following is strongest acid?

    • ACH3COOH
    • BCH3CH2COOH
    • CC6H5CG2COOH
    • DFCH2COOH✓

    Explanation

    D is the correct option, as it contains a halogen which have strong electron-withdrawing effects.

    Appeared in past papers: 2009, 2011, 2013

50. 50

    Repeated 7×Miscellaneous

    For the reaction N2+ 3H2 —-->2NH3 The production of NH3 will be favored at:

    • AHigh pressure and catalyst✓
    • BLow pressure only
    • CLow pressure and catalyst
    • DHigh pressure only
    • ECatalyst only

    Explanation

    When pressure is applied on a system that contains gasses then the reaction will shift in the direction that contains less number of molecules. High Pressure will shift the reaction towards the right-hand side which is favored to attain more product and Catalyst helps to obtain a new equilibrium faster.

    Appeared in past papers: 2009, 2010

51–100 most repeated

51. 51

    Repeated 7×Alkyl Halides and Amines

    Which of the following is not a nucleophile?

    • ANH3
    • BOH
    • CCN-
    • DBr2✓

    Explanation

    Br₂ is not a nucleophile because:No Significant Negative Charge:Nucleophiles are electron-rich species that donate electrons.Br₂ is a neutral molecule with no formal negative charge, making it less likely to donate electrons.Weak Electron Donation Ability:Even though Br atoms have lone pairs, they are held tightly and not readily available for donation.Instead, Br₂ tends to act as an electrophile (electron acceptor), especially in reactions like electrophilic addition.Polarizability but No Strong Nucleophilic Character:Br₂ is a polarizable molecule, meaning it can momentarily develop dipoles,

    Appeared in past papers: 2009, 2010

52. 52

    Repeated 7×Aldehydes and Ketones

    Which type of reaction takes place when a carbonyl compound is treated with a mixture of NaCN and an acid?

    • AElectrophilic addition reaction
    • BSubstitution reaction
    • CNucleophilic addition reaction✓
    • DDisplacement reaction

    Explanation

    The given scenario is an example of a nucleophilic addition reaction, as the reactant, CN- is a nucleophile which adds across the carbonyl bond. Option A describes reactions undergone by alkenes, where an electrophile is added across the carbon-carbon double bond. Option B describes a reaction where one group of atoms is replaced by another group of atoms, but this is not the case here. Option D describes a reaction in which one element is replaced by another element in a compound.

    Appeared in past papers: 2019

53. 53

    Repeated 7×Carboxylic Acids and its Derivatives

    Which of the following catalysts is used in the below reaction?

    • AConc. H2SO4✓
    • BPurnice stone
    • CPt
    • DNi

    Explanation

    Esterification process is a slow process when it is performed at room temperature also the process does not complete at all in the room temperature. So to complete the process of esterification there should be something to complete the process as well as to speed up the process. Thus concentrated sulphuric acid is added. It is a catalyst which will speed up the process and esterification will proceed speedily and complete on time. Also concentrated sulphuric acid has a property to remove water. Therefore it also acts as a dehydrating agent. After adding this will take reaction in the equilibri

    Appeared in past papers: 2018

54. 54

    Repeated 7×Thermochemistry

    The enthalpy change accompanying the gain of an electron by a neutral gaseous atom to form a negative ion is called:

    • AIonization potential
    • BElectronegativity
    • CElectron affinity✓
    • DLattice energy
    • EPotential energy

    Explanation

    When an electron is added to a neutral gaseous atom to convert it into a negative ion, the enthalpy change accompanying the process is called Electron affinity enthalpy. Ionization potential, in chemistry, is the amount of energy required to remove an electron from an isolated atom or molecule. Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. Lattice energy is defined as the energy required to separate a mole of an ionic solid into gaseous ions. Potential energy is energy that is stored – or conserved - in an object or substance.

    Appeared in past papers: 2010

55. 55

    Repeated 7×Hydrocarbons

    Catenation is a process in which carbon shows the properties of:

    • AMaking single bond
    • BHybridization
    • CMaking chains or rings of carbon atoms✓
    • DIsomerism
    • EBreaking of bonds

    Explanation

    Catenation is the process by which an atom is able to form a bond with another atom of its kind. Carbon possesses this ability hence is able to form ringed structures.

    Appeared in past papers: 2010

56. 56

    Repeated 7×Thermochemistry

    Which of the following values of heat of formation indicates that the product is least stable?

    • A- 94 kcal
    • B+ 21.4 kcal
    • C- 231 kcal
    • D+ 64.8 kcal✓

    Explanation

    In the context of heat of formation (ΔH), a negative value indicates that the formation of the compound is exothermic, meaning the compound is more stable compared to its constituent elements in their standard states.So, the least stable compound among the options provided would have the most positive (ΔH) value and option d has the most positive value ,hence that is the correct option.

    Appeared in past papers: 2017

57. 57

    Repeated 7×Alkyl Halides and Amines

    Which alkyl halide has the lowest reactivity for a particular alkyl group?

    • AR-F✓
    • BR-Cl
    • CR-Br
    • DR-I

    Explanation

    This is the correct answer. Alkyl halides are compounds in which a halogen atom (F, Cl, Br, or I) is bonded to a carbon atom. The reactivity of alkyl halides generally increases in the order R-F < R-Cl < R-Br < R-I. This trend is due to the decreasing bond strength between the carbon atom and the halogen atom as the size of the halogen increases.

    Appeared in past papers: 2018, 2023

58. 58

    Repeated 7×Hydrocarbons

    Which of the following substitutents is an Ortho and Para director and ring deactivating?

    • A–OH
    • B–NH2
    • C–Cl✓
    • D–OCH3

    Explanation

    In electrophilic aromatic substitution, the nature of the substituent on the benzene ring plays a crucial role in determining the position of new substituents and the reactivity of the ring. Ortho-para directors are groups that direct incoming electrophiles to the 2, 4 (ortho, para) positions. While most ortho-para directors are activating, -Cl is an exception as it directs due to resonance but deactivates due to a strong inductive effect. This means it reduces the overall reactivity of the benzene ring but still allows for substitution at ortho and para positions.In contrast, –OH and –NH2 gro

    Appeared in past papers: 2014

59. 59

    Repeated 7×Hydrocarbons

    Which of the following compounds undergo nitration most readily?

    • ABenzene
    • BToluene✓
    • CBenzoic acid
    • DNitrobenzene

    Explanation

    The correct answer is Toluene. Toluene undergoes nitration much faster than benzene due to the presence of a methyl group. This group donates electron density to the ring, particularly enhancing the reactivity at the ortho and para positions, making the electrophilic aromatic substitution process more favorable.Why the other options are incorrect:Benzene: While benzene can undergo nitration, it lacks activating groups, making it less reactive compared to toluene.Benzoic Acid: The carboxyl group is a deactivating group, reducing electron density in the ring and hindering electrophilic attack.Ni

    Appeared in past papers: 2014

60. 60

    Repeated 7×Chemical Bonding

    Which one of the following is most ionic?

    • ANaCl
    • BMgCl2
    • CKCl✓
    • DAlCl3

    Explanation

    The correct answer is KCl because it forms the most ionic bond among the options provided. Potassium (K) is larger and has a lower charge density than sodium (Na), making it easier to lose its valence electron and form a K+ cation. According to Fajan's rules, larger cations with a lower charge density form more ionic bonds, which is why KCl is more ionic than NaCl. NaCl is ionic, but sodium's smaller size compared to potassium leads to a slightly higher charge density, resulting in less ionic character compared to KCl.MgCl2 has a +2 charge on magnesium, which increases the covalent character o

    Appeared in past papers: 2014

61. 61

    Repeated 7×Combination Mistake

    The culpable child _ some words to her mother for pardoning his delinquency.

    • AMumbled✓
    • BShowy
    • CRude
    • DCrazy

    Explanation

    'Mumbled' is to say something indistinctly and quietly, making it difficult for others to hear. So, the correct sentence is, "The culpable child mumbled some words to her mother for pardoning his delinquency."

    Appeared in past papers: 2019

62. 62

    Repeated 7×Phrases

    Identify the word or phrase that needs to be changed for the sentence to be correct:The stories that she makes out for her children ought to be written down and published.

    • AThat
    • BMakes out✓
    • COught to
    • DWritten down
    • ENo error

    Explanation

    "That" is correctly placed as a demonstrative pronoun.To "make out" means to manage with some difficulty to see or hear someone or something so it is incorrectly used here. "Makes" would be the correct word for the blank."Ought to" can be used to indicate light responsibility or urgency. It is correctly used in the sentence.It means to record something by writing down.An error was present in the sentence.

    Appeared in past papers: 2008

63. 63

    Repeated 7×Verb

    The headmaster _ to speak to you.

    • AWants✓
    • BIs wanting
    • CWas wanting
    • DWant

    Explanation

    “The headmaster wants to speak to you” in Option A sounds most appropriate because "headmaster" is a singular noun so we should complement it with a singular verb - eliminating Option D. The tense is simple present indicated by the verb "speak", hence the present continuous form "is wanting" in Option B is also incorrect. while the past tense form in Option C is also incorrect.

    Appeared in past papers: 2020

64. 64

    Repeated 7×Work, Power & Energy

    Energy consumed by 60 watt bulb in 2 minutes is equal to:

    • A7.2 kilo joules✓
    • B720 joules
    • C120 joules
    • D72000 joules

    Explanation

    Power=Energy/time Energy=power ×time 60 watt×120 sec =7200 J =7.2 kilo J.

    Appeared in past papers: 2018

65. 65

    Repeated 7×Current Electricity

    Kirchhoff's first law/rule corresponds to:

    • ALaw of conservation of energy
    • BLaw Of conservation Of momentum
    • CLaw of conservation of charge✓
    • DLaw of conservation of mass

    Explanation

    Kirchhoff's first law states that the algebraic sum of current flowing into a junction is zero. This rule corresponds to conservation of charge which states that total charge in a closed system remains constant because current is the rate of flow of charge.

    Appeared in past papers: 2019

66. 66

    Repeated 7×Electrostatics

    Coulomb's law is given by the formula: F=kq1 q2 / r2The magnitude of k having the unit of Nm2 C-2 for free space is equal to

    • A9 x 107
    • B6 x 107
    • C10 x 109
    • D9 x 109✓

    Explanation

    The Coulomb constant, the electric force constant, or the electrostatic constant (denoted ke, k or K) is a proportionality constant in electrostatics equations. In SI units it is equal to 8.9875517923(14)×109 (9*109)kg⋅m3⋅s−2⋅C−2

    Appeared in past papers: 2018

67. 67

    Repeated 7×Forces and Motion

    Which one of the following is a non-conservative force?

    • AElectric force
    • BElastic spring force
    • CGravitational force
    • DFrictional force✓

    Explanation

    Conservative forces, such as gravitational, electric, and elastic spring forces, depend only on the initial and final positions of an object, meaning the work done is independent of the path taken. On the other hand, frictional force is a non-conservative force because the work done by friction depends on the path taken. This is because frictional forces convert kinetic energy into thermal energy, which is dissipated and cannot be recovered, making the process path-dependent.

    Appeared in past papers: 2010

68. 68

    Repeated 7×Electromagnetic Waves

    Which one of the following is not electromagnetic in nature?

    • AX-rays
    • BGamma rays
    • CCathode rays✓
    • DInfrared rays

    Explanation

    Cathode rays EM waves travel with a constant velocity of 3.00x10⁸ ms-1 in vacuum. They are deflected neither by the electric field, nor by the magnetic field. These waves do not require a medium to travel from one place to another. As cathode rays negate all these properties, they are not considered as EM waves.

69. 69

    Repeated 7×Forces and Motion

    Assume that you have two balls of identical volume, one weighing 2 Newtons and the other 10 Newtons. Both are falling freely after being released from the same point simultaneously. Which of the following will then be true: I. The 10 N ball falling freely from rest will be accelerated at a greater rate than the 2 N ball II. At the end of the 4s of freefall, the 10 N ball will have 5 times the momentum of the 2 N ball III. At the end of the 4s of free fall, the 10 N ball will have the same kinetic energy as the 2 N ball IV. The 10 N ball possesses greater inertia than the 2 N ball

    • AI, Il and Ill only
    • BI and II only
    • CII and IV only✓
    • DIV only
    • ENone of these

    Explanation

    Acceleration of free fall acts equally on all masses, this is why both objects despite having different masses have the same speed at any point in time. Statement II is correct because two objects have the same velocity but one having 5 times more mass than the other will have 5 times more momentum than the other object. Statement IV is also correct because inertia depends upon mass since a 10N ball has a higher mass it will have greater inertia. Statement III is wrong because objects have different masses so their kinetic energy can not be the same. Statement I is wrong because objects accele

    Appeared in past papers: 2010

70. 70

    Repeated 7×Electronics

    In a full-wave bridge rectification, the number of diodes used are:

    • A1
    • B2
    • C3
    • D4✓

    Explanation

    A full-wave bridge rectifier consists of 4 diodes arranged in a bridge configuration. This arrangement allows the rectifier to convert both halves of an AC waveform into a pulsating DC output. When the positive half-cycle of the AC input is applied, diodes D1 and D2 conduct, allowing current to flow through the load. During the negative half-cycle, diodes D3 and D4 conduct, again directing current through the load in the same direction. This ensures that the load always receives a unidirectional current. Options A, B, and C are incorrect because they do not provide the necessary number of diod

    Appeared in past papers: 2020

71. 71

    Repeated 7×Magnetism and Electromagnetic Induction

    An electron is moving along the axis of a solenoid carrying a current. Which of the following is a correct statement about the electromagnetic force acting on the electron?

    • AThe force acts radially inwards
    • BThe force acts radially outwards
    • CThe force acts in the direction of motion
    • DNo force acts✓

    Explanation

    The question states along the axis of a solenoid. This implies that the Magnetic feild is parallel to the direction of current (For magnetic force to act, it is necessary that the direction of current and magentic feild are perpendicular to eachother) Therefore, no force acts and electron moves straight through without getting deflected.

    Appeared in past papers: 2017, 2018

72. 72

    Repeated 7×Work, Power & Energy

    Power developed by a person on eating 100g of ice per minute is (Latent heat of ice is 80 cal/g):

    • A130 W
    • B560 cal/sec
    • C560 J/sec✓
    • Dnone of these

    Explanation

    A mass of ice eaten by the man per second. m =100/60=5/3 g/s Latent heat of ice, L = 80 cal/g. Therefore, energy required per second by the man in eating the ice, i.e., power developed by the man. = mL =5/3 x 80 cal/s 3 =5x80/3x4.2J/s=560W

73. 73

    Repeated 7×Wave Motion and Sound

    The path difference for the constructive interference is:

    • A(n-1)λ
    • B(n+1)λ
    • Cn λ / 2
    • D2n λ
    • En λ✓

    Explanation

    Option A: (n-1)λ: This is the path difference for destructive interference. When the path difference is one wavelength less than a whole number of wavelengths, the waves will be out of phase and will cancel each other out. Option B: (n+1)λ: This is also the path difference for destructive interference. When the path difference is one wavelength more than a whole number of wavelengths, the waves will be out of phase and will cancel each other out. Option C: nλ/2: This is the path difference for a node. A node is a point where the waves cancel each other out completely. Option D: 2nλ: This is no

    Appeared in past papers: 2018

74. 74

    Repeated 7×Forces and Motion

    An object moving through a fluid experiences a retarding force known as drag force. The drag force _ as the speed of the object _

    • ADecreases _ Decreases
    • BDecreases _ Increases
    • CIncreases _ Decreases
    • DIncreases_ Increases✓

    Explanation

    Drag is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid.You feel the drag force when you move your hand through the water. You might also feel it if you move your hand during a strong wind. The faster you move your hand, the harder it is to move.Drag force FD is propotional to the square of the speed of the objects. Mathematically,FD = 1/2 C p Av2, Drag force is directly proportional to the square of velocity, so as the speed of the body increases drag force increases.

    Appeared in past papers: 2014, 2015

75. 75

    Repeated 7×Logical Reasoning

    All children are silly people. Some silly people are rich people. All rich people are big shots. Which of the following conclusions are NECESSARILY TRUE?CONCLUSIONS:I. Some silly people are children.II. Some rich people are children.III. Some silly people are big shots.

    • AI and III✓
    • BII
    • CII and III
    • DI and II

    Explanation

    Let's analyze each conclusion one by one: I. "Some silly people are children." This conclusion is necessarily true based on the given statements. While it's mentioned that "All children are silly people," it implies that there are some silly people who are children. It's possible that there are other silly people who are not children. II. "Some rich people are children." This conclusion is not necessarily true based on the given statements. Although it's mentioned that "Some silly people are rich people" and "All children are silly people," it doesn't necessarily mean that there are rich peopl

    Appeared in past papers: 2022, 2023

76. 76

    Repeated 7×Logical Reasoning

    Complete the sequence:2, 15, 41, 80, _

    • A111
    • B120
    • C121
    • D132✓

    Explanation

    Find the differences between consecutive terms:15 - 2 = 1341 - 15 = 2680 - 41 = 39Notice the pattern in the differences: The differences are increasing by 13 each time (13, 26, 39).Find the next difference: The next difference would be 39 + 13 = 52.Find the next term in the sequence: Add the next difference to the last term: 80 + 52 = 132.Therefore, the next number in the sequence is 132.

    Appeared in past papers: 2014

77. 77

    Repeated 6×Variation and Genetics

    The Law of Dominance Is illustrated in the garden pea by:

    • AHomozygous tall x heterozygous tall
    • BHeterozygous tall x heterozygous tall
    • CHomozygous tall x homozygous tall
    • DPure short x pure short
    • EHomozygous tall x pure short✓

    Explanation

    The Law of Dominance states that in a heterozygous individual, the dominant allele will determine the phenotype while the recessive allele is masked. In this case, the cross between a homozygous tall plant (TT) and a pure short plant (tt) clearly illustrates this law, as all offspring (Tt) will be tall, demonstrating that the dominant allele 'T' expresses itself over the recessive 't'.The other options do not adequately illustrate the Law of Dominance: the first option shows both parents expressing the tall phenotype, while the second option leads to a mix of phenotypes. The third option resul

    Appeared in past papers: 2010, 2011

78. 78

    Repeated 6×Subject Verb Agreement

    Choose the BEST Option.It is better for me to _ than to shed the blood of an innocent boy.

    • ADied
    • BDie✓
    • CHad died
    • DHave died

    Explanation

    The sentence is structured in a way that requires an infinitive verb form ("to die")."Die" is the infinitive form of the verb that correctly fits after "to" in this sentence.

    Appeared in past papers: 2018

79. 79

    Repeated 6×Combination Mistake

    Select the incorrect segment:Your argument is simply abstruse as there is no clarity of thought and coherence in ideas and it also lack vision.

    • AIs
    • BOf
    • CIn
    • DLack✓

    Explanation

    The incorrect segment is: "it also lack vision."Explanation:The subject "it" is singular, so the verb should also be singular."Lack" is incorrect because it is the base form of the verb, while the correct form should be "lacks" to match the singular subject.Corrected sentence:"Your argument is simply abstruse as there is no clarity of thought and coherence in ideas, and it also lacks vision."

    Appeared in past papers: 2011

80. 80

    Repeated 6×Passages

    Select the NEAREST CORRECT MEANING of the given word.TRANSIENT

    • APermanent
    • BTemporary✓
    • CLong
    • DGood

    Explanation

    Transient means something that ends after a a certain time/fades away, which is synonymous to “temporary”.

    Appeared in past papers: 2014, 2017

81. 81

    Repeated 6×Miscellaneous

    An 'elegy‘ is a poem written:

    • AIn the memory of little child
    • BOn the death of someone dear✓
    • COn the sighting of an old tutor
    • DIn the love of dear sweetheart

    Explanation

    An "elegy" is a poem written to express sorrow, grief, or lamentation, typically in response to the death of a loved one or to reflect on the passing of something significant. It is a form of poetry that is meant to evoke feelings of mourning and remembrance. ELEGY, poem lamenting the death of a public personage or of a friend or loved one; by extension, any reflective lyric on the broader theme of human mortality.

    Appeared in past papers: 2013, 2014

82. 82

    Repeated 6×Combination Mistake

    It’s raining cats and dogs. So there are _ cars on the road today.

    • AFew✓
    • BA few
    • CA big number of
    • DA great deal of

    Explanation

    Few means "not many (people or things)."A few means "some (people or things)." Few cars” would imply almost no cars. 'A few cars' suggests there are not very many cars. So the first is a comparison, while the second is a quantity. Since we are comparing the number of cars on the road when it is raining with when it is not, we would use “few cars” hence the correct answer is A whereas options C and D are not logically correct because on rainy days we don’t see many cars.

    Appeared in past papers: 2018

83. 83

    Repeated 6×Subject Verb Agreement

    Select the option which fits appropriately in the blank:Everyone _ done his or her homework.

    • AHas✓
    • BHave
    • CHad
    • DNone

    Explanation

    This is the correct form. "Has" is used with the indefinite pronoun "everyone," which is singular. In English, indefinite pronouns like "everyone," "somebody," "anybody," etc., are treated as singular subjects and require a singular verb form. Therefore, "has" agrees with "everyone" in number.

    Appeared in past papers: 2021

84. 84

    Repeated 6×Adjective

    Which contains an adjective?

    • AOld man✓
    • BOn Tuesday
    • CShe said
    • DAnd you
    • EAfternoon

    Explanation

    A. Old is an adjective here as it modifies the noun ‘man’.B. On Tuesday is an example of adverb of time.C. She said is an example of an intransitive verb.D. And you is just a sentence.E. Afternoon is a noun.

    Appeared in past papers: 2014, 2016

85. 85

    Repeated 6×Work, Power & Energy

    Which of the following statement shows that no work is done?

    • APushing a car to start it moving
    • BLifting the weights.
    • CThe moon Orbiting the earth.✓
    • DWriting an essay on a page.

    Explanation

    When the moon revolves around the earth, the displacement is normal to the direction of force on the moon. Therefore no work is done by the moon.Work is the dot product of force and displacement.W=F.dcos theta

    Appeared in past papers: 2019

86. 86

    Repeated 6×Electrostatics

    Electric field strength at a point between oppositely charged plates is 'E'. If the distance between plates is reduced to half, what will be the new value of electric intensity?

    • A4E
    • BE/2
    • CE/4
    • D2E✓

    Explanation

    Between two parallel plates, the electric field strength is given by: E = V/d If the distance is halved, electric field strength is doubled since both are inversely related.

    Appeared in past papers: 2019

87. 87

    Repeated 6×Circular Motion & Momentum

    Work done, due to centripetal force, for circular motion will be:

    • AReduced
    • BZero✓
    • CMaximum
    • DHalf

    Explanation

    The displacement of an object after one complete revolution is 0 as the object returns to its original position. The beginning and final locations of a body that travels a distance and returns to its original place are the same. The displacement is zero in this situation, but the distance travelled is not.As work done = force x displacement, given that the displacement is 0, work done is also 0.

    Appeared in past papers: 2019

88. 88

    Repeated 6×Work, Power & Energy

    In a practical transformer mutual induction between primary and secondary coils takes place. In such transformer what can be deduced about the power.

    • APower output = Power input
    • BPower output > Power input
    • CPower output ≥ Power input
    • DPower output < Power input✓

    Explanation

    The output power in a transformer is always less than the input power because of the different losses in a transformer. The losses may be Iron loss or core loss, hysteresis loss, eddy current loss, copper loss etc.

    Appeared in past papers: 2018

89. 89

    Repeated 6×Logical Reasoning

    If ‘-’ means ‘+’, ‘+’ means ‘-’, ‘*’ means ‘÷’ and ‘÷’ means ‘*’ then which of the following will be the correct equation?

    • A10 + 5 - 14 ÷ 10 * 15 = 158
    • B30 + 5 + 14 - 10 * 15 = 122
    • C30 - 5 + 14 ÷ 10 * 15 = 162
    • D30 * 5 - 4 ÷ 10 + 15 = 31✓
    • ENone of these

    Explanation

    Your equation is:10 + 5 - 14 ÷ 10 * 15 = 158First, replace the symbols:+ → -- → +÷ → ** → ÷Thus, the equation becomes:10 - 5 + 14 * 10 ÷ 15Now, solve step-by-step following BODMAS:Multiplication and Division first:14 * 10 = 140140 ÷ 15 ≈ 9.333...Now the equation becomes:10 - 5 + 9.333...Left to right (Addition/Subtraction):10 - 5 = 55 + 9.333... = 14.333...Thus:Final result: 14.333..

    Appeared in past papers: 2015, 2021

90. 90

    Repeated 6×Logical Reasoning

    An autograph can not exist without?

    • AActor
    • BSinger
    • CPlayer
    • DPen✓

    Explanation

    An autograph is defined as a person's handwritten signature, mostly of someone famous among the masses. As a pen is necessary to do a signature by hand, hence it is the answer.

    Appeared in past papers: 2022

91. 91

    Repeated 6×Logical Reasoning

    Passage: There is a family of six persons G, J, B, E, T and Z. Their professions are teacher, writer, actor, singer, dancer and lawyer but not respectively in the same order. G is a teacher. Z is a dancer. B is neither writer nor actor. E is neither singer nor lawyer. T is an actor. J is a lawyer. Who among them has a profession of lawyer?

    • AJ✓
    • BB
    • CE
    • DT

    Explanation

    The passage explicitly states, "J is a lawyer." Therefore, J is the person with the profession of a lawyer.

92. 92

    Repeated 5×Reproduction

    Referring to sexual reproduction, humans are:

    • AHermaphrodites
    • BVivaparous✓
    • COviparous
    • DSelf-fertilized

    Explanation

    The main difference between oviparous and viviparous animals is that oviparous animals do not undergo any embryonic development inside the mother whereas viviparous animals develop into young animals inside the mother. This means oviparous animals lay eggs. These eggs develop and hatch into young individuals.A hermaphrodite is an organism with both male and female genitalia. In sexually reproducing organisms, males have organs that produce male gametes, usually sperm. Sometimes the genders pair off equally, one male for one female. Other times, one male or female will breed with a large group

    Appeared in past papers: 2018, 2023

93. 93

    Repeated 5×Combination Mistake

    Which of the following sentences is correct?

    • AI want to live near my parents live
    • BI want to live where my parents live✓
    • CI want to live where, my parents live
    • DI want to live where: my parents live

    Explanation

    Correct because "where" properly introduces the clause "my parents live," making the sentence grammatically sound.

    Appeared in past papers: 2023

94. 94

    Repeated 5×Combination Mistake

    The parents were stunned when they saw that children had created complete _ in the bedroom.

    • AKnack
    • BGroggy
    • CDank
    • DMayhem✓

    Explanation

    'Mayhem' means violent or extreme disorder; chaos. So, the correct sentence is, "The parents were stunned when they saw that children had created complete mayhem in the bedroom."

    Appeared in past papers: 2019

95. 95

    Repeated 5×Preposition

    Choose the BEST Option.The region _ which they were passing was known as the Land of Thirst and Death.

    • AThrough✓
    • BBy
    • CIn
    • DFrom

    Explanation

    Through can be used as a preposition, an adverb, and an adjective. It has several meanings, including “from one side to the other,” “from beginning to end,” and “during an entire period”: He rode his bicycle through the door and onto the street. You have to read the book through if you want to be prepared for class.

    Appeared in past papers: 2018

96. 96

    Repeated 5×Combination Mistake

    I _ caution in interpreting these results.

    • AUrge✓
    • BUsher
    • CUsurp
    • DUproot

    Explanation

    As a noun, 'urge' means a desire. As a verb, it means to strongly encourage. 'Urge' is related to the word, 'urgent' or 'pressing'. An 'urge' is a pressing want, one that is almost a compulsion, like when you're so frustrated, you have the urge to scream. If you urge someone to do something, you feel strongly about it.

    Appeared in past papers: 2019

97. 97

    Repeated 5×Combination Mistake

    Select the incorrect segment:The patient’s blood analysis shows that there is a big number of amorphous cells which are quiet unidentifiable.

    • APatient’s
    • BOf
    • CWhich
    • DQuiet✓

    Explanation

    The right word that should be used at this place is QUITE which means absolutely. QUEIT refers to not saying anything which is not the word required here .

    Appeared in past papers: 2011

98. 98

    Repeated 5×Combination Mistake

    The disease is uncurable without the judicious use of antibiotics.

    • AUncurable✓
    • BWithout
    • CJudicious
    • DUse

    Explanation

    "Uncurable" is not a word. The correct word is "Incurable".

    Appeared in past papers: 2011

99. 99

    Repeated 5×Combination Mistake

    She might be forgiven for _ beneath the pressure.

    • AUndertaking
    • BExtricating
    • CBuckling✓
    • DResounding

    Explanation

    Buckle means to collapse under weight or pressure; hence, C is the correct answer.

    Appeared in past papers: 2016

100. 100

     Repeated 5×Verb

     Pakistan _ from voting against Iran in the United Nations.

     • APrevented
     • BDetained
     • CAbstained✓
     • DRefuse

     Explanation

     The correct answer is Abstained. In diplomatic language, 'abstaining' from a vote means a country chooses not to cast a vote for or against a proposal, which aligns with the context of the sentence about Pakistan's action in the United Nations.Prevented and Detained imply physical actions to stop or delay something, which do not match the context of choosing not to participate in a vote. Refuse would imply a more active rejection, and it does not fit the formal context of diplomatic voting behavior in this sentence structure.

     Appeared in past papers: 2010, 2016

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