POST UTME EKSU 2021 Biology | Objective

Are you preparing for POST UTME EKSU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2021 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a eukaryotic cell, what is the primary function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
Correct C. Lipid synthesis and modification
D. Protein degradation

Correct Answer: C

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Question 2
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?
A. The cell will shrink due to water loss
Correct B. The cell will swell due to water uptake
C. The cell will remain unchanged
D. The cell will burst due to osmotic pressure

Correct Answer: B

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Question 3
A diagram of a human eye is shown below. What is the function of the part labeled A?
Correct A. To focus light on the retina
B. To detect light and color
C. To regulate pupil size
D. To produce tears

Correct Answer: A

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Question 4
A diagram of a plant cell is shown below. What is the function of the part labeled B?
A. To regulate water and ion balance
Correct B. To provide structural support
C. To synthesize proteins
D. To store genetic information

Correct Answer: B

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Question 5
A diagram of a human brain is shown below. What is the function of the part labeled C?
A. To regulate body temperature
B. To control voluntary movements
Correct C. To process sensory information
D. To store memories

Correct Answer: C

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Question 6
The diagram below represents a cross-section of the human eye. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 7
A population of bacteria is growing exponentially. If the initial population is 100 and the population doubles every 2 hours, what will be the population after 6 hours?
A. 1000
B. 2000
C. 4000
Correct D. 8000

Correct Answer: D

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Question 8
A gene has two alleles, A and a. The genotype of a plant is Aa. What is the probability that the plant will produce an offspring with the genotype AA?
Correct A. 0.25
B. 0.5
C. 0.75
D. 1

Correct Answer: A

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Question 9
A person has a blood type of AB. If they have children with a person of blood type O, what is the probability that the child will have a blood type of AB?
Correct A. 0.25
B. 0.5
C. 0.75
D. 1

Correct Answer: A

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Question 10
A plant has a genotype of Rr. If it is crossed with a plant of genotype rr, what is the probability that the offspring will have a genotype of Rr?
A. 0.25
Correct B. 0.5
C. 0.75
D. 1

Correct Answer: B

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Question 11
In the context of the human visual system, what is the primary function of the optic nerve?
Correct A. To transmit visual information from the retina to the brain
B. To regulate the amount of light entering the eye
C. To focus light onto the retina
D. To detect changes in color and brightness

Correct Answer: A

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Question 12
A plant's xylem is responsible for transporting water and minerals from the roots to the leaves. What is the primary mechanism by which this transport occurs?
A. Through the process of osmosis
Correct B. Through the process of transpiration
C. Through the process of diffusion
D. Through the process of active transport

Correct Answer: B

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Question 13
The human nervous system is responsible for controlling and coordinating the body's functions. What is the primary function of the hypothalamus?
A. To regulate body temperature
Correct B. To control hunger and thirst
C. To regulate sleep and wakefulness
D. To control blood pressure

Correct Answer: B

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Question 14
In genetics, what is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic drift
C. Natural selection
Correct D. Heritability

Correct Answer: D

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Question 15
The human respiratory system is responsible for exchanging oxygen and carbon dioxide between the body and the environment. What is the primary function of the alveoli?
A. To regulate the amount of oxygen in the blood
Correct B. To exchange oxygen and carbon dioxide between the body and the environment
C. To filter out dust and other particles from the air
D. To produce mucus to trap pathogens

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. 0.48
B. 0.32
C. 0.16
D. 0.64

Correct Answer: A

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

Correct Answer: B

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Question 18
A species of bird has a beak length of 10 cm. If the beak length is normally distributed with a mean of 12 cm and a s\tandard deviation of 2 cm, what is the probability that a randomly selected bird will have a beak length greater than 14 cm?
Correct A. 0.1
B. 0.2
C. 0.3
D. 0.4

Correct Answer: A

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Question 19
A population of bacteria is growing exponentially with a growth rate of 0.05 per hour. If the initial population is 1000, what is the population after 5 hours?
A. 5000
Correct B. 10000
C. 15000
D. 20000

Correct Answer: B

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Question 20
A species of plant has a photosynthetic rate of 10 mg CO2 per hour. If the light intensity is increased by 50%, what is the new photosynthetic rate?
A. 5
B. 10
Correct C. 15
D. 20

Correct Answer: C

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Question 21
In the context of evolutionary theory, what is the primary mechanism by which genetic drift acts to reduce genetic variation within a population?
A. Gene flow
B. Mutation
Correct C. Genetic drift
D. Natural selection

Correct Answer: C

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Question 22
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. Photosynthesis
Correct B. Respiration
C. Cell division
D. Protein synthesis

Correct Answer: B

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Question 23
In a population of 100 individuals, 20 have the genotype 'AA', 40 have the genotype 'Aa', and 40 have the genotype 'aa'. What is the frequency of the recessive allele 'a'?
A. 0.1
Correct B. 0.2
C. 0.3
D. 0.4

Correct Answer: B

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Question 24
A diagram of a human digestive system is shown below. What is the primary function of the structure labeled 'Y'?
A. Mechanical digestion
Correct B. Chemical digestion
C. Absorption
D. Elimination

Correct Answer: B

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Question 25
In a population of 100 individuals, 20 have the genotype 'BB', 40 have the genotype 'Bb', and 40 have the genotype 'bb'. What is the frequency of the dominant allele 'B'?
A. 0.1
Correct B. 0.2
C. 0.3
D. 0.4

Correct Answer: B

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