POST UTME MOUNTAIN TOP UNIVERSITY 2022 Biology | Objective

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Question 1 View Details
In a eukaryotic cell, the process of mitosis involves the division of the nucleus into two daughter nuclei, each containing the same number and kind of chromosomes as the parent nucleus. Which of the following stages of mitosis is responsible for the condensation of chromosomes?
Correct A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: A

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Question 2 View Details
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of glu\cose. Which of the following pigments is responsible for absorbing light energy in the blue and red regions of the visible spectrum?
Correct A. Chlorophyll a
B. Chlorophyll b
C. Carotenoids
D. Phycobiliproteins

Correct Answer: A

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Question 3 View Details
The human body's transport system is responsible for moving subs\tances throughout the body. Which of the following types of blood vessels is responsible for the exchange of oxygen and carbon dioxide between the blood and the tissues?
A. Arteries
B. Veins
Correct C. Capillaries
D. Lymphatic vessels

Correct Answer: C

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Question 4 View Details
The process of digestion in the human body involves the breakdown of food into smaller molecules that can be absorbed and utilized by the body. Which of the following enzymes is responsible for breaking down proteins into amino acids?
A. Amylase
B. Lipase
C. Pep\sin
Correct D. Tryp\sin

Correct Answer: D

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Question 5 View Details
The process of evolution in living organisms involves the change in the frequency of alleles in a population over time. Which of the following mechanisms of evolution is responsible for the increase in the frequency of a beneficial allele?
Correct A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation

Correct Answer: A

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Question 6 View Details
A population of Drosophila melanogaster is being studied for its genetic variation. The frequency of the recessive allele 'a' is 0.2. What is the expected frequency of the homozygous recessive genotype 'aa' in the population?
Correct A. 0.04
B. 0.16
C. 0.36
D. 0.64

Correct Answer: A

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Question 7 View Details
A diagram of a plant cell is shown below. Identify the part labeled 'X'.
A. A
B. B
C. C
Correct D. D

Correct Answer: D

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Question 8 View Details
A species of bird has a wing span of 2 meters. If the bird is flying at a speed of 50 km/h, what is the angular velocity of the bird's wings?
A. 0.25 rad/s
Correct B. 0.5 rad/s
C. 1 rad/s
D. 2 rad/s

Correct Answer: B

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Question 9 View Details
A diagram of a human kidney is shown below. Identify the part labeled 'Y'.
A. A
B. B
Correct C. C
D. D

Correct Answer: C

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Question 10 View Details
A species of fish has a body length of 10 cm. If the fish is swimming at a speed of 5 m/s, what is the frequency of the fish's tail beats?
A. 0.5 Hz
Correct B. 1 Hz
C. 2 Hz
D. 5 Hz

Correct Answer: B

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Question 11 View Details
In a tropical rainforest, the primary consumers are primarily herbivores that feed on the abundant plant life. Which of the following is a characteristic of these herbivores?
Correct A. They have a large cecum to house a diverse community of microbes.
B. They have a short digestive tract to quickly process plant material.
C. They have a large liver to detoxify plant toxins.
D. They have a large pancreas to produce digestive enzymes.

Correct Answer: A

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Question 12 View Details
A population of rabbits is introduced to a new island with no natural predators. Which of the following is a likely consequence of this introduction?
A. The rabbit population will stabilize at a carrying capacity.
Correct B. The rabbit population will increase exponentially.
C. The rabbit population will decrease due to lack of food.
D. The rabbit population will remain cons\tant.

Correct Answer: B

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Question 13 View Details
A scientist is studying the process of photosynthesis in a plant. Which of the following is a byproduct of photosynthesis?
Correct A. Oxygen gas
B. Carbon dioxide gas
C. Water vapor
D. Nitrogen gas

Correct Answer: A

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Question 14 View Details
A bio\logist is studying the structure of a cell membrane. Which of the following is a characteristic of the cell membrane?
A. It is a rigid structure that provides support to the cell.
Correct B. It is a semi-permeable membrane that regulates the movement of subs\tances.
C. It is a \single layer of phospholipids that surrounds the cell.
D. It is a complex structure that contains many organelles.

Correct Answer: B

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Question 15 View Details
A geneticist is studying the inheri\tance of a trait in a population. Which of the following is a type of genetic variation?
Correct A. Mutation
B. Gene flow
C. Genetic drift
D. Natural selection

Correct Answer: A

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Question 16 View Details
The enzyme responsible for the breakdown of starch into maltose is:
Correct A. Amylase
B. Lactase
C. Maltase
D. Sucrase

Correct Answer: A

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Question 17 View Details
The process by which plants release water vapor into the air is called:
Correct A. Transpiration
B. Respiration
C. Photosynthesis
D. Evaporation

Correct Answer: A

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Question 18 View Details
The type of genetic variation that occurs when there is a change in the number of chromosomes is called:
A. Mutation
B. Genetic drift
C. Gene flow
Correct D. Polyploidy

Correct Answer: D

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Question 19 View Details
The process by which the body gets rid of waste products is called:
Correct A. Excretion
B. Respiration
C. Photosynthesis
D. Osmoregulation

Correct Answer: A

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Question 20 View Details
The type of blood vessel that carries oxygenated blood away from the heart is called:
Correct A. Artery
B. Vein
C. Capillary
D. Aorta

Correct Answer: A

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Question 21 View Details
The process by which plants make their own food from sunlight is called:
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmoregulation

Correct Answer: A

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Question 22 View Details
The type of genetic variation that occurs when there is a change in the DNA sequence is called:
Correct A. Mutation
B. Genetic drift
C. Gene flow
D. Polyploidy

Correct Answer: A

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Question 23 View Details
The process by which the body regulates the amount of water in the body is called:
Correct A. Osmoregulation
B. Excretion
C. Respiration
D. Photosynthesis

Correct Answer: A

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Question 24 View Details
The type of blood vessel that carries deoxygenated blood back to the heart is called:
Correct A. Vein
B. Artery
C. Capillary
D. Aorta

Correct Answer: A

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Question 25 View Details
The process by which plants release water vapor into the air is called:
Correct A. Transpiration
B. Respiration
C. Photosynthesis
D. Evaporation

Correct Answer: A

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