Kpk Biology 2011 — Solved MCQs

Question 1

Amoeba moves from one place to another by means of

Accepted Answer

C. pseudopodia — Amoebas move by extending and retracting pseudopodia, temporary projections of the cell membrane and cytoplasm. This process, known as amoeboid movement, allows them to propel themselves forward by flowing cytoplasm within the cell.

Question 2

Depletion of glycogen ,accumulation of lactic acid cause deficit of oxygen , ATP and

Accepted Answer

D. fatigue — Depletion of glycogen and accumulation of lactic acid can lead to fatigue, as there's a reduced capacity for muscles to produce ATP efficiently. However, tetany, which is characterized by sustained muscle contractions, is not directly caused by these factors.

Question 3

The axon and the dendrons of the neuron are collectively called

Accepted Answer

A. nerve fiber — The axon and dendrites collectively can be referred to as "nerve fibers." Nerve fibers are the main components of nerve cells (neurons) and are responsible for transmitting electrical impulses throughout the nervous system.

Question 4

Epinephrine, a hormone secreted by endocrine gland is called

Accepted Answer

C. adrenaline — Epinephrine, a hormone secreted by the adrenal glands, is also known as adrenaline.

Question 5

The male gametes are sperms and process of their formation is called

Accepted Answer

D. spermatogenesis — The male gametes are sperm cells, and the process of their formation is called spermatogenesis. Spermatogenesis occurs in the seminiferous tubules of the testes and involves a series of mitotic, meiotic, and morphological changes that ultimately result in the production of mature sperm cells capable of fertilizing an egg.

Question 6

In angiosperm the seeds are

Accepted Answer

C. inside the fruit — In angiosperms, seeds are typically enclosed within fruits.

Question 7

To understand the concept of differentiation, Hans Spemann carried out a series of experiments in.

Accepted Answer

A. 1924 — In 1924, Hans Spemann carried out a series of experiments in embryology, particularly focusing on amphibian embryos such as those of salamanders and frogs. His key experiments involved manipulating embryonic cells and studying their developmental outcomes.

Question 8

Gene mutation is the change in the sequence of

Accepted Answer

B. nucleotides — Gene mutation is the alteration or change in the sequence of nucleotides within a gene. Genes are composed of DNA, which consists of four nucleotide bases: adenine (A), thymine (T), cytosine (C), and guanine (G).

Question 9

Y linked genes directly pass through Y chromosome form

Accepted Answer

B. father to son — Y-linked genes, also known as holandric genes, are genes that are found on the Y chromosome. These genes are passed directly from father to son, as the Y chromosome is inherited exclusively from the father in mammals.

Question 10

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 11

Which one of the following is the biotic component of our ecosystem?

Accepted Answer

D. consumer — "Consumer" represents the biotic component of the ecosystem. Consumers are organisms that obtain energy by consuming other organisms. They include herbivores (plant-eaters), carnivores (meat-eaters), omnivores (eating both plants and animals), and decomposers (which break down organic matter).

Question 12

The A blood group persons have normally

Accepted Answer

B. antibody B — The A blood group individuals normally have antibodies against the B antigen. This means they have antibodies in their blood plasma that recognize and can potentially attack red blood cells with the B antigen on their surface.

Question 13

Which of the following acts as host during the production of insulin by recombinant DNA technology?

Accepted Answer

A. bacterial cell — In the production of insulin by recombinant DNA technology, bacterial cells such as Escherichia coli (E. coli) are often used as hosts. These bacterial cells are genetically engineered to contain the human gene that codes for insulin.

Question 14

Cell death due to tissue damage is called

Accepted Answer

A. necrosis — Cell death due to tissue damage is often referred to as necrosis. Necrosis can occur in response to various factors such as infection, trauma, toxins, or lack of oxygen. It typically involves cell swelling, rupture of cellular membranes, and inflammation in the surrounding tissue.

Question 15

The inborn behavior that does not involve parental sign, training or experience is called

Accepted Answer

C. conditional reflex — The inborn behavior that does not involve parental sign, training, or experience is called instinct or innate behavior. These behaviors are genetically programmed and are typically present from birth or shortly thereafter without requiring any learning or external influence. Examples of instinctual behaviors include reflex actions, migration, courtship rituals, and territorial behavior.

Question 16

Goiter is produced when the diet has deficiency of

Accepted Answer

C. iodine — Goiter is typically associated with iodine deficiency in the diet. Iodine is an essential nutrient required for the production of thyroid hormones. When the body doesn't get enough iodine, the thyroid gland enlarges in an attempt to trap more iodine from the bloodstream, resulting in the characteristic swelling of the neck known as goiter.

Question 17

Which one of the following is non-renewable source of energy?

Accepted Answer

C. minerals — "minerals" is typically considered a non-renewable source of energy. While minerals themselves are not sources of energy like fossil fuels, they are often extracted and used in energy production processes, such as mining for coal or metals used in constructing power plants.

Question 18

When the weak organism gets benefits from the strong host and does not cause the immediate death of the host, it is called

Accepted Answer

C. parasite — When a weak organism benefits from a strong host without causing immediate death, it is often referred to as a form of symbiosis known as parasitism. In parasitism, the weaker organism, called the parasite, benefits at the expense of the host organism, but typically does not cause immediate death. Instead, it may cause harm or discomfort to the host while deriving nutrients or other resources from it.

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