Practice MCQ Questions and answers on Biology-GK

51

Where the mature sperm are produced?

A) Scrotum B) Vas deferens C) Prostate gland D) Testes

Discuss

Answer & Solution

Answer: Option D

Solution:

The structure on top of the seminiferous tubules in the testes is the epididymis. The sperm migrate from of the seminiferous tubules to the epididymis. Within the epididymis, the sperm mature while they are stored in this structure.

52

During rainy season wooden doors are difficult to open or closure because of ?

A) Imbibition B) Plasmolysis C) Diffusion D) Osmosis

Discuss

Answer & Solution

Answer: Option A

Solution:

Imbibition is a process in which the biological colloidal substances absorb water and show swelling and increase in volume. This happens when the wood of doors and window absorb water and swell during rainy season and cause problems as these do not fit in the frame and do not get closed.

53

Which statement concerning the diagnosis of ADHD is true?

A) Boys are more likely to be diagnosed with ADHD than girls B) Most children "outgrow" symptoms of ADHD C) About 20 percent of school-age children are diagnosed with ADHD D) Racial minority status is a good predictor of being diagnosed with ADHD

Discuss

Answer & Solution

Answer: Option A

Solution:

Boys are more likely to be diagnosed with ADHD than girls. Racial minority status is a good predictor of being diagnosed with ADHD.

54

According to Erikson, the goal of adolescence is to

A) Independent identity B) Explore who they are C) Both a & b D) None of the above

Discuss

Answer & Solution

Answer: Option C

Solution:

Identity versus confusion is the fifth stage of ego according to psychologist Erik Erikson's theory of psychosocial development. This stage occurs during adolescence between the ages of approximately 12 and 18. During this stage, adolescents explore their independence and develop a sense of self.

55

Which one of the following weeds is effective in controlling water pollution caused by industrial effluents?

A) Parthenium B) Elephant grass C) Water hycinth D) Mogar grass

Discuss

Answer & Solution

Answer: Option A

Solution:

Parthenium is effective in controlling water pollution caused by industrial effluents.

56

Lichens are the best indicator of

A) Air pollution B) Water pollution C) Soil pollution D) Noise pollution

Discuss

Answer & Solution

Answer: Option A

Solution:

Lichens are sensitive to atmospheric pollution such as nitrogen (N) because they receive all their nutrients and water from wet and dry atmospheric deposition (fall out).

57

Which one of the following processes takes place in lakes during eutrophication?

A) Rapid destruction of algal growth B) Excessive availability of dissolved oxygen C) Loss of dissolved nutrients from water D) Excessive entry of nutrient into water

Discuss

Answer & Solution

Answer: Option D

Solution:

In lakes, when there's a excess entry of nutrients in water, the growth of plant life takes place. This phenomenon is called Eutrophication. Thus, the correct answer is (d).

58

Which organelles supply energy to the cell?

A) Mitochondria B) Cytoplasm C) Ribosomes D) None of the above

Discuss

Answer & Solution

Answer: Option A

Solution:

Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

59

Who of the following is known as the Father of Biology?

A) Darwin B) Lamarck C) Aristotle D) Theophrastus

Discuss

Answer & Solution

Answer: Option C

Solution:

Development as a sequential knowledge of biology took place in the era of the famous Greek philosopher Aristotle (384-322 B.C.). He revealed his thoughts about various aspects of the life of plants and animals. Therefore, Aristotle is called as the Father of Biology.

60

Which is not a function of the cell membrane?

A) Helps substances pass from the cytoplasm into the nucleus B) Keeps materials within the cell separated from the environment outside the cell C) Helps control the movement of materials into and out of the cell D) Allows the cell to change shape under pressure

Discuss

Answer & Solution

Answer: Option A

Solution:

Cell membrane does not help substances pass from the cytoplasm into the nucleus.