Kpk Biology 2014 — Solved MCQs

Question 1

The nitrogenous waste product in cockroach is _.

Accepted Answer

C. Uric acid — The major excretory product in the cockroach is uric acid and hence it is called a uricotelic animal. The body cells discharge nitrogenous wastes into the haemolymph. The nitogenous wastes are absorbed by Malpighian tubules and converted into uric acid.

Question 2

The Longest Period of inter Phase is _.

Accepted Answer

B. G1- Period — For a typical rapidly proliferating human cell with a total cycle time of 24 hours, the G1 phase might last about 11 hours, S phase about 8 hours, G2 about 4 hours, and M about 1 hour. Other types of cells, however, can divide much more rapidly.

Question 3

The number of linkage groups in man is_.

Accepted Answer

B. 23 — The number of linkage groups corresponds to the number of homologous pairs of chromosomes. Man has 23 linkage groups.

Question 4

Ethology is the study of _.

Accepted Answer

C. Animal behavior — Ethology is the scientific study of animal behavior dealing with the interaction of animals with each other, with other living beings, and with the environment.

Question 5

The substance which is named for its ability to stimulate cell division is known as_

Accepted Answer

C. Cytokinins — Cytokinins. Unlike other hormones, cytokinins are found in both plants and animals. They stimulate cell division and often are included in the sterile media used for growing plants from tissue culture.

Question 6

Which type of disease ADA is?

Accepted Answer

C. genetic — ADA, or Adenosine Deaminase Deficiency, is a genetic disorder that affects the immune system. Specifically, it is a type of primary immunodeficiency disorder. This condition is caused by mutations in the ADA gene, which leads to a deficiency in the enzyme adenosine deaminase. This enzyme plays a crucial role in the development and function of certain immune cells, particularly lymphocytes.

Question 7

The inactive, non-conducting wood is called_

Accepted Answer

B. Heartwood — The inactive non- conducting wood is called heartwood. In most species, the heartwood accumulates a variety of chemicals such as resins, oils, gums and tannins. These provide a resistance to decay and insect attack, for example, in red cedar and conifers.

Question 8

The blood group AB has_Antibodies

Accepted Answer

D. None of these — AB blood can be transfused only into AB recipients because they have neither anti - A, nor anti B antibodies.

Question 9

Joints between the bones of cranium and those of the face are _

Accepted Answer

A. Immoveable joints — Cranial bones are the bones that form the bony case of skull to protect the brain. The type of joint present in between them is called sutures. Suture is a type of fibrous immovable joint present only in skull.

Question 10

Mesophytes are the ordinary plants _ which grow under average conditions of moisture

Accepted Answer

D. Land — Mesophytes are intermediate in water use and needs. These plants are found in average conditions of temperature and moisture and grow in soil that has no water logging. The roots of mesophytes are well developed, branched and provided with a root cap.

Question 11

Which hormone of the pituitary gland controls the reabsorption of water by the kidney?

Accepted Answer

B. ADH — ADH (antidiuretic hormone) is a hormone secreted by the posterior pituitary gland. It acts chiefly on nephrons and helps to increase the reabsorption of water from the kidney tubules.

Question 12

Genetic code is transmitted from nucleus to cytoplasm in the form of _

Accepted Answer

C. mRNA — The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm.

Question 13

Which one is non-renewable source of energy?

Accepted Answer

D. Minerals — Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy. Once these resources are used up, they cannot be replaced, which is a major problem for humanity as we are currently dependent on them to supply most of our energy needs.

Question 14

Parthenocarpic fruits are_

Accepted Answer

C. Seedless — Fruits that develop without fertilization of the ovule are called parthenocarpic fruits. Since there is no fertilization, such fruits are seedless. Parthenocarpy can be natural or artificially induced by using plant hormones like auxins. Banana is an example of parthenocarpic fruit.

Question 15

Stone cancer is caused due to_

Accepted Answer

B. Acid rain — Stone cancer is a phenomenon in which the discoloration of stones/marbles occurs due to acid rain. It is also known as Marble cancer. The pollutants present in acid rain reacts with the stone to change their colour.

Question 16

What type of dominance is there in snapdragon flower_

Accepted Answer

B. Incomplete — Flower color in snapdragons is an example of incomplete dominance. When a red-flowered plant is crossed with a white-flowered plant, the F1 generation has pink flowers.

Question 17

The living organisms which can prepare their own food are known as_

Accepted Answer

C. Producers — An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers.

Question 18

Night blindness is caused due to the deficiency of_

Accepted Answer

A. Vitamin A — Night blindness is one of the first signs of vitamin A deficiency. In its more severe forms, vitamin A deficiency contributes to blindness by making the cornea very dry, thus damaging the retina and cornea.

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