POST UTME BSU 2022 Biology | Objective

Are you preparing for POST UTME BSU 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.

Practice these randomly selected questions to test your readiness.

Question 1
A study on the genetic variation of a population found that the frequency of the recessive allele 'a' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
A. 0
B. 2
Correct C. 20
D. 200

Correct Answer: C

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Question 2
The diagram below shows the structure of a plant cell. What is the function of the cell wall?
Correct A. to provide structural support
B. to regulate the movement of materials
C. to produce energy
D. to synthesize proteins

Correct Answer: A

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Question 3
A researcher is studying the effect of pH on the growth of a microorganism. The researcher measures the growth rate of the microorganism at different pH levels and plots the data on a graph. What type of graph would the researcher most likely use?
A. bar chart
B. pie chart
C. line graph
Correct D. scatter plot

Correct Answer: D

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Question 4
A population of rabbits is growing at a rate of 20% per year. If the initial population size is 100, what will be the population size after 5 years?
A. 1000
B. 2000
C. 4000
Correct D. 8000

Correct Answer: D

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Question 5
A study on the eco\logy of a forest found that the forest is composed of 60% trees, 20% shrubs, and 20% grasses. What is the percentage of the forest that is not trees?
A. 20%
Correct B. 40%
C. 60%
D. 80%

Correct Answer: B

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Question 6
In a population of 1000 individuals, 70% are heterozygous for the gene controlling the flower color, while 30% are homozygous dominant. If 10% of the population is randomly sampled, what is the probability that at least one individual in the sample is homozygous dominant?
A. 0.3
B. 0.4
Correct C. 0.5
D. 0.6

Correct Answer: C

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Question 7
A researcher is studying the effect of pH on the growth of E. coli. The researcher measures the growth rate of E. coli at different pH levels and plots the data on a graph. If the growth rate is highest at pH 7, what can be concluded about the optimal pH for E. coli growth?
A. pH 5 is optimal for E. coli growth
Correct B. pH 7 is optimal for E. coli growth
C. pH 9 is optimal for E. coli growth
D. pH 10 is optimal for E. coli growth

Correct Answer: B

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Question 8
A diagram of a plant cell is shown below. Identify the part of the cell labeled 'A'.
Correct A. Nucleus
B. Mitochondria
C. Cell wall
D. Chloroplast

Correct Answer: A

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Question 9
A researcher is studying the effect of temperature on the rate of photosynthesis in a plant. The researcher measures the rate of photosynthesis at different temperatures and plots the data on a graph. If the rate of photosynthesis is highest at 25°C, what can be concluded about the optimal temperature for photosynthesis?
A. 20°C is optimal for photosynthesis
Correct B. 25°C is optimal for photosynthesis
C. 30°C is optimal for photosynthesis
D. 35°C is optimal for photosynthesis

Correct Answer: B

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Question 10
A diagram of a human cell is shown below. Identify the part of the cell labeled 'B'.
A. Mitochondria
Correct B. Nucleus
C. Cell wall
D. Chloroplast

Correct Answer: B

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Question 11
The process by which a cell divides into two daughter cells is called _______.
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Endosymbiosis

Correct Answer: A

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Question 12
The genetic material in eukaryotic cells is organized into _______.
A. Mitochondria
Correct B. Chromatin
C. Ribosomes
D. Lysosomes

Correct Answer: B

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Question 13
The transport of water and minerals from the roots to the leaves of a plant is primarily through the _______.
Correct A. Xylem
B. Phloem
C. Cortex
D. Pith

Correct Answer: A

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Question 14
The hormone that stimulates the growth of roots in plants is _______.
Correct A. Auxin
B. Gibberellin
C. Cytokinin
D. Ethylene

Correct Answer: A

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Question 15
The process by which an organism's genetic information is passed from one generation to the next is called _______.
A. Heritability
Correct B. Inheri\tance
C. Genetic Variation
D. Genetic Drift

Correct Answer: B

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Question 16
The Hardy-Weinberg principle states that allele frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. However, this principle assumes that the population is infinite, has no mutation, and has no gene flow. Which of the following is NOT a requirement for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
Correct D. A population size of 1000

Correct Answer: D

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Question 17
In the process of cellular respiration, which of the following is the primary function of the electron transport chain?
Correct A. To generate ATP
B. To produce NADH and FADH2
C. To reduce oxygen to water
D. To produce heat

Correct Answer: A

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Question 18
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. Which of the following is the primary reac\tant in the light-dep\endent reactions?
A. Water
B. Carbon dioxide
Correct C. Light energy
D. ATP

Correct Answer: C

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Question 19
The process of digestion in the human body involves the breakdown of complex nutrients into simpler molecules. 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 20
The process of cellular division involves the replication of DNA and the separation of chromosomes. Which of the following is the primary function of the spindle fibers in mitosis?
Correct A. To separate chromosomes
B. To replicate DNA
C. To condense chromosomes
D. To decondense chromosomes

Correct Answer: A

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Question 21
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following is the primary function of the citric acid cycle?
A. To generate ATP
Correct B. To produce NADH and FADH2
C. To reduce oxygen to water
D. To produce citrate

Correct Answer: B

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Question 22
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. Which of the following is the primary product of the light-indep\endent reactions?
Correct A. Glu\cose
B. Oxygen
C. ATP
D. NADPH

Correct Answer: A

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Question 23
The process of digestion in the human body involves the breakdown of complex nutrients into simpler molecules. Which of the following enzymes is responsible for breaking down carbohydrates into simple sugars?
Correct A. Amylase
B. Lipase
C. Pep\sin
D. Tryp\sin

Correct Answer: A

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Question 24
The process of cellular division involves the replication of DNA and the separation of chromosomes. Which of the following is the primary function of the centrioles in mitosis?
A. To separate chromosomes
B. To replicate DNA
C. To condense chromosomes
Correct D. To form the spindle fibers

Correct Answer: D

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Question 25
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following is the primary function of the electron transport chain?
Correct A. To generate ATP
B. To produce NADH and FADH2
C. To reduce oxygen to water
D. To produce heat

Correct Answer: A

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