POST UTME COVENANT UNIVERSITY 2022 Biology | Objective

Are you preparing for POST UTME COVENANT UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2022 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
Correct B. To pump protons across the mitochondrial membrane
C. To produce NADH and FADH2
D. To reduce oxygen to water

Correct Answer: B

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Question 2
A researcher is studying the effect of pH on the activity of the enzyme lactase. Which of the following is a likely outcome?
A. The enzyme activity increases as pH increases
Correct B. The enzyme activity decreases as pH decreases
C. The enzyme activity remains cons\tant over a wide pH range
D. The enzyme activity is unaffected by pH changes

Correct Answer: B

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Question 3
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. To synthesize proteins
Correct B. To store genetic information
C. To regulate cell growth
D. To transport materials across the cell membrane

Correct Answer: B

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Question 4
A geneticist is studying the inheri\tance of a particular trait in a population. Which of the following is a likely outcome of a cross between two heterozygous individuals?
A. The offspring will all be homozygous dominant
B. The offspring will all be homozygous recessive
C. The offspring will be a mix of homozygous dominant and homozygous recessive
Correct D. The offspring will all be heterozygous

Correct Answer: D

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Question 5
A diagram of a human eye is shown below. What is the function of the structure labeled 'B'?
A. To focus light on the retina
Correct B. To regulate the amount of light entering the eye
C. To detect color
D. To detect movement

Correct Answer: B

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Question 6
The diagram below shows the structure of a prokaryotic cell. Which of the following is NOT a characteristic of prokaryotic cells?
A. They have a true nucleus
B. They have a cell wall
C. They have a large amount of cytoplasm
Correct D. They have a complex system of Golgi apparatus

Correct Answer: D

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Question 7
The graph below shows the relationship between the concentration of a substrate and the rate of enzyme activity. What is the name of the enzyme that catalyzes this reaction?
A. Amylase
B. Lactase
Correct C. Tryp\sin
D. Pep\sin

Correct Answer: C

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Question 8
The diagram below shows the structure of a plant cell. Which of the following is a function of the vacuole?
Correct A. Storage of water and nutrients
B. Regulation of cell turgor pressure
C. Production of ATP through photosynthesis
D. Synthesis of proteins

Correct Answer: A

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Question 9
The graph below shows the relationship between the concentration of a substrate and the rate of enzyme activity. What is the name of the enzyme that catalyzes this reaction?
A. Amylase
B. Lactase
Correct C. Tryp\sin
D. Pep\sin

Correct Answer: C

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Question 10
The diagram below shows the structure of a prokaryotic cell. Which of the following is a characteristic of prokaryotic cells?
A. They have a true nucleus
B. They have a cell wall
Correct C. They have a large amount of cytoplasm
D. They have a complex system of Golgi apparatus

Correct Answer: C

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Question 11
The process of meiosis results in the production of four haploid cells from a diploid cell. What is the primary reason for this reduction in the number of chromosomes?
A. To increase genetic diversity
B. To reduce the number of chromosomes
Correct C. To prepare for gamete formation
D. To increase the number of chromosomes

Correct Answer: C

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Question 12
A population of rabbits is growing exponentially. If the initial population is 100 and the growth rate is 20% per year, what will be the population after 5 years?
A. 1000
B. 2000
C. 4000
Correct D. 8000

Correct Answer: D

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Question 13
The diagram below shows a cross-section of a plant root. What is the function of the tissue labeled 'A'?
Correct A. To absorb water and minerals
B. To store food
C. To support the plant
D. To produce hormones

Correct Answer: A

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Question 14
A genetic trait is controlled by a \single gene with two alleles. If the dominant allele is 'A' and the recessive allele is 'a', what is the genotype of an individual that is homozygous dominant?
Correct A. AA
B. Aa
C. aa
D. Ab

Correct Answer: A

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Question 15
The diagram below shows a graph of the growth of a population over time. What is the rate of growth of the population?
A. 10% per year
Correct B. 20% per year
C. 30% per year
D. 40% per year

Correct Answer: B

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Question 16
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
Correct A. 0.64
B. 0.36
C. 0.16
D. 0.84

Correct Answer: A

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Question 17
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'rr'?
A. 0.25
Correct B. 0.5
C. 0.75
D. 0.9

Correct Answer: B

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Question 18
A cell is in the G2 phase of the cell cycle. If the cell is treated with a drug that prevents DNA replication, what will happen to the cell?
A. The cell will continue to grow and divide.
B. The cell will enter the G1 phase.
C. The cell will undergo apoptosis.
Correct D. The cell will be arrested in the G2 phase.

Correct Answer: D

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Question 19
A person has a visual acuity of 20/200 in their right eye and 20/100 in their left eye. What is their visual acuity in the better eye?
A. 20/200
Correct B. 20/100
C. 20/50
D. 20/20

Correct Answer: B

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Question 20
A diagram of the human eye is shown below. What is the name of the structure labeled 'A'?
Correct A. Cornea
B. Iris
C. Lens
D. Retina

Correct Answer: A

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Question 21
In the context of evolutionary theory, what is the primary mechanism by which species adapt to their environment?
Correct A. Natural Selection
B. Genetic Drift
C. Mutation
D. Gene Flow

Correct Answer: A

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Question 22
A diagram of the xylem and phloem in a plant is shown below. What is the primary function of the xylem?
Correct A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Support and storage
D. Protection from pathogens

Correct Answer: A

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Question 23
The diagram below shows a cross-section of a human eye. What is the primary function of the retina?
Correct A. Detection of light and color
B. Focu\sing of light
C. Protection from glare
D. Production of tears

Correct Answer: A

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Question 24
A diagram of the human skeletal system is shown below. What is the primary function of the sternum?
Correct A. Protection of internal organs
B. Attachment of muscles
C. Support of the head and neck
D. Production of blood cells

Correct Answer: A

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Question 25
The diagram below shows a cross-section of a human brain. What is the primary function of the cerebrum?
A. Control of movement and balance
B. Regulation of body temperature
Correct C. Proces\sing of sensory information
D. Production of hormones

Correct Answer: C

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