POST UTME RSU 2022 Biology | Objective

Are you preparing for POST UTME RSU 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
In a population of 1000 individuals, 200 are heterozygous for a particular gene, while 400 are homozygous recessive. What is the frequency of the dominant allele?
A. 0.4
Correct B. 0.6
C. 0.8
D. 1.0

Correct Answer: B

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Question 2
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.25 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 1.0 m/s
B. 1.5 m/s
Correct C. 2.0 m/s
D. 2.5 m/s

Correct Answer: C

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Question 3
A researcher is studying the effect of pH on the growth of E. coli bacteria. The researcher measures the growth rate of the bacteria at different pH levels and obtains the following data: pH 7, growth rate 0.5; pH 8, growth rate 0.8; pH 9, growth rate 1.2. What is the best-fit linear equation for the data?
A. y = 0.1x + 0.5
B. y = 0.2x + 0.5
Correct C. y = 0.3x + 0.5
D. y = 0.4x + 0.5

Correct Answer: C

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Question 4
A 5-kg object is moving in a circular path with a radius of 2 m. The object has a speed of 4 m/s. What is the centripetal acceleration of the object?
A. 1.0 m/s^2
Correct B. 2.0 m/s^2
C. 3.0 m/s^2
D. 4.0 m/s^2

Correct Answer: B

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Question 5
A researcher is studying the effect of temperature on the rate of a chemical reaction. The researcher measures the rate of the reaction at different temperatures and obtains the following data: 20°C, rate 0.5; 30°C, rate 0.8; 40°C, rate 1.2. What is the activation energy of the reaction?
A. 10 kJ/mol
B. 20 kJ/mol
Correct C. 30 kJ/mol
D. 40 kJ/mol

Correct Answer: C

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Question 6
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells is known as
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Endoreduplication

Correct Answer: A

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Question 7
The process by which plants convert light energy into chemical energy is known as
A. Respiration
Correct B. Photosynthesis
C. Transpiration
D. Translocation

Correct Answer: B

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Question 8
The sense organ responsible for detecting changes in light intensity is the
Correct A. Eye
B. Ear
C. Nose
D. Tongue

Correct Answer: A

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Question 9
The process by which cells divide to produce two daughter cells is known as
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Endoreduplication

Correct Answer: A

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Question 10
The sense organ responsible for detecting changes in sound waves is the
A. Eye
Correct B. Ear
C. Nose
D. Tongue

Correct Answer: B

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Question 11
In a diploid cell, what is the ratio of autosomal chromosomes to sex chromosomes during meiosis?
A. 1:1
Correct B. 2:1
C. 1:2
D. 2:2

Correct Answer: B

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Question 12
A patient is diagnosed with a genetic disorder caused by a point mutation in a gene encoding a protein involved in DNA repair. Which of the following is a likely consequence of this mutation?
Correct A. Increased risk of cancer
B. Increased risk of genetic disorders
C. Decreased risk of genetic disorders
D. No effect on genetic disorders

Correct Answer: A

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Question 13
A researcher is studying the effect of a new antibiotic on a bacterial population. The researcher observes that the bacteria are resis\tant to the antibiotic. What is the most likely explanation for this observation?
A. The bacteria have a mutation in the antibiotic target gene
B. The bacteria have a mutation in the antibiotic resis\tance gene
Correct C. The bacteria have a horizontal gene transfer of the antibiotic resis\tance gene
D. The bacteria have a vertical gene transfer of the antibiotic resis\tance gene

Correct Answer: C

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Question 14
A patient is diagnosed with a genetic disorder caused by a deletion of a gene encoding a protein involved in muscle function. Which of the following is a likely consequence of this deletion?
Correct A. Muscle weakness
B. Muscle hypertrophy
C. Muscle atrophy
D. No effect on muscle function

Correct Answer: A

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Question 15
A researcher is studying the effect of a new drug on a population of mice. The researcher observes that the mice have an increased risk of cancer. What is the most likely explanation for this observation?
Correct A. The drug causes a mutation in a gene involved in DNA repair
B. The drug causes a mutation in a gene involved in cell cycle regulation
C. The drug causes a horizontal gene transfer of a gene involved in cancer
D. The drug causes a vertical gene transfer of a gene involved in cancer

Correct Answer: A

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Question 16
In the context of evolutionary theory, what is the primary mechanism by which genetic drift occurs?
A. Mutation
B. Genetic recombination
C. Gene flow
Correct D. Random sampling of alleles

Correct Answer: D

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Question 17
A diagram of the human nervous system is shown below. Which part of the brain is responsible for regulating body temperature?
A. Cerebrum
Correct B. Hypothalamus
C. Cerebellum
D. Brainstem

Correct Answer: B

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Question 18
The Hardy-Weinberg principle states that a population will be in genetic equilibrium if the following conditions are met. Which of the following is NOT a necessary condition?
A. Random mating
B. No mutation
C. No gene flow
Correct D. Cons\tant population size

Correct Answer: D

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Question 19
A diagram of the human excretory system is shown below. Which part of the system is responsible for filtering waste from the blood?
A. Liver
Correct B. Kidneys
C. Pancreas
D. Spleen

Correct Answer: B

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Question 20
The process of osmoregulation in animals involves the regulation of water and electrolyte balance. Which of the following is a mechanism by which animals osmoregulate?
A. Kidney function
B. Hormonal regulation
C. Behavioral adaptations
Correct D. All of the above

Correct Answer: D

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Question 21
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'?
A. 0.36
Correct B. 0.64
C. 0.36
D. 0.64

Correct Answer: B

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Question 22
A 2.5 L flask contains 0.5 M glu\cose solution. If 0.1 M NaOH is added to the solution, what is the pH of the resulting solution?
A. 11.5
Correct B. 12.3
C. 13.1
D. 14.5

Correct Answer: B

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Question 23
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the light intensity is increased by a factor of 2, what is the new photosynthetic rate?
A. 5
B. 10
C. 15
Correct D. 20

Correct Answer: D

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Question 24
A 50-year-old man has a blood pressure of 180/100 mmHg. What is the diastolic blood pressure?
A. 80
Correct B. 100
C. 120
D. 140

Correct Answer: B

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Question 25
A 30-year-old woman has a body mass index (BMI) of 25. What is her weight in kg?
A. 40
B. 50
Correct C. 60
D. 70

Correct Answer: C

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