Kpk Biology 2021 — Solved MCQs

Question 1

_ is the dominant trait of flower position in pea plants.

Accepted Answer

D. Axial — The dominant trait of flower position in pea plants is "axial." This means the flowers are located along the stem, rather than at the tip (terminal). In terms of color, purple is dominant over yellow in Mendelian genetics.

Question 2

A person with _ blood type can receive blood from any blood type.

Accepted Answer

B. AB — A person with AB blood type can receive blood from any blood type. This is because individuals with AB blood type have both A and B antigens on their red blood cells and do not produce antibodies against either A or B blood types.

Question 3

Total number of Genetic codes are _.

Accepted Answer

B. 64 — Total number of Genetic codes is 64. If three base pairs combination will be used, gives 64 combinations which is more than enough, the biologist hypothesized that each amino acid is coded by triplet of base pairs.

Question 4

Similarities in characteristics resulting from common ancestry is known as _.

Accepted Answer

D. Homology — This is the correct term for the concept described in the question. Homology refers to similarities in characteristics resulting from common ancestry. These similarities are due to shared evolutionary history rather than convergent evolution. For example, the similar bone structure in the forelimbs of humans, bats, and whales is considered homologous because it derives from a common ancestor.

Question 5

The random loss of alleles in a population is called _.

Accepted Answer

D. Genetic drift — This is the correct term for the concept described in the question. Genetic drift is the random fluctuation of allele frequencies in a population due to chance events. These chance events can include things like random deaths, births, or other demographic factors. Genetic drift is particularly important in small populations, where chance events can have a significant impact on allele frequencies over time.

Question 6

_ is an immunosuppressive agent.

Accepted Answer

C. Cyclosporine — Cyclosporine is indeed an immunosuppressive agent. It's commonly used to prevent organ rejection after transplant surgery and to treat autoimmune diseases by inhibiting the activity of T cells in the immune system.

Question 7

Types of pain receptors are:

Accepted Answer

D. All of the above — All of the above are types of pain receptors so this option is correct.

Question 8

All of the given are secreted by anterior pituitary except _.

Accepted Answer

B. ADH — ADH, also known as vasopressin, is not secreted by the anterior pituitary gland. Instead, it is produced by the hypothalamus and stored and released from the posterior pituitary gland. ADH regulates water balance in the body by controlling the reabsorption of water by the kidneys, thus affecting urine concentration.

Question 9

Hypersecretion of insulin results in _.

Accepted Answer

C. Hypoglycemia — Hypersecretion of insulin can lead to hypoglycemia, which is characterized by abnormally low blood sugar levels. This can result in symptoms such as sweating, trembling, confusion, and even loss of consciousness if severe.

Question 10

Territorial behaviour is exhibited by _.

Accepted Answer

A. Baboons — Baboons show territorial behaviour. The Old World monkeys lack a prehensile tail, and their nostrils open downward. They include mandrills, macaques, rhesus monkeys, and baboons.

Question 11

_ is not a cause of male infertility.

Accepted Answer

A. Uterine fibroids — Uterine fibroids are noncancerous growths of the uterus that can cause fertility issues in women by interfering with the implantation of a fertilized egg. However, they are not a cause of male infertility.

Question 12

The protective coat which surround the embryo is known as _.

Accepted Answer

C. Amnion — The amnion is the innermost membrane that surrounds the embryo in reptiles, birds, and mammals. It contains the amniotic fluid, which cushions and protects the embryo, as well as regulates temperature and prevents dehydration.

Question 13

_ is directly connected with larynx.

Accepted Answer

D. Trachea — The trachea, also known as the windpipe, is the airway that connects the larynx to the bronchi. It is directly connected with the larynx and serves as the passage for air to move in and out of the lungs.

Question 14

Isoniazid and rifampin are the most common drugs used for treatment of _.

Accepted Answer

C. Tuberculosis — Isoniazid and rifampin are the most common drugs used in the treatment of tuberculosis (TB), a bacterial infection that primarily affects the lungs but can also affect other parts of the body.

Question 15

Which animal can derive water from cellular oxidation?

Accepted Answer

A. Kangroo rat — Some animals like camel, kangaroo-rat, etc., in the absence of environmental water get it through metabolic water by breakdown of fats and other compounds during cellular oxidation reactions as a byproduct.

Question 16

The level of uric acid may rise due to high intake of _ in the food.

Accepted Answer

B. Protein — This is the correct answer. High intake of protein-rich foods, especially those high in purines like red meat, organ meats, and certain seafood, can lead to increased uric acid levels. When the body breaks down purines, it produces uric acid as a byproduct.

Question 17

Number of bones in human skull are _.

Accepted Answer

D. 28 — The axial skeleton is on the central axis of the body and comprises the skull, vertebral column and thoracic cage including ribs and sternum. It has eighty (80) bones, including twenty-eight bones in the skull, one hyoid bone, twenty-six bones in the vertebral column, twenty-four ribs and one sternum.

Question 18

_ joints permit movement in one plane.

Accepted Answer

A. Hinge — These joints permit movement in one plane, like a door hinge. Examples include the elbow and knee joints.

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