POST UTME BOWEN UNIVERSITY 2020 Biology | Objective

Are you preparing for POST UTME BOWEN UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2020 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 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. 0.36
B. 0.64
C. 0.72
D. 0.84

Correct Answer: A

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Question 2
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 3
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Mitochondria
B. Chloroplast
Correct C. Nucleus
D. Vacuole

Correct Answer: C

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Question 4
A diagram of a simple circuit is shown below. What is the current flowing through the circuit?
A. 2A
Correct B. 3A
C. 4A
D. 5A

Correct Answer: B

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Question 5
A diagram of a titration setup is shown below. What is the pH of the solution after the addition of 25 mL of 0.1 M HCl?
A. 1
B. 2
Correct C. 3
D. 4

Correct Answer: C

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Question 6
The process by which an organism's genetic information is passed from one generation to the next is known as:
A. Mutation
B. Genetic Drift
C. Natural Selection
Correct D. Heritability

Correct Answer: D

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Question 7
The diagram below shows the structure of a plant cell. Which part is responsible for photosynthesis?
A. Vacuole
Correct B. Chloroplast
C. Cell Wall
D. Cytoplasm

Correct Answer: B

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Question 8
The following equation represents the reaction of sodium hydroxide with hydrochloric acid to form water and sodium chloride. What is the balanced chemical equation for this reaction?
Correct A. \( 2NaOH + HCl \rightarrow 2NaCl + H_2O \)
B. \( NaOH + HCl \rightarrow NaCl + H_2O \)
C. \( 2NaOH + 2HCl \rightarrow 2NaCl + 2H_2O \)
D. \( NaOH + 2HCl \rightarrow NaCl + H_2O \)

Correct Answer: A

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Question 9
The diagram below shows the structure of a human eye. Which part is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 10
The following graph shows the relationship between the concentration of a solution and its osmotic pressure. What is the equation of the line of best fit?
A. \( P = 0.5nRT \)
B. \( P = nRT \)
C. \( P = \frac{nRT}{2V} \)
Correct D. \( P = \frac{nRT}{V} \)

Correct Answer: D

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Question 11
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'RR'?
Correct A. 0.64
B. 0.36
C. 0.16
D. 0.84

Correct Answer: A

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Question 12
A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. If the gas is heated to 127°C at cons\tant volume, what is the new pressure?
A. 2.5 atm
Correct B. 3.5 atm
C. 4.5 atm
D. 5.5 atm

Correct Answer: B

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Question 13
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'?
Correct A. 0.25
B. 0.5
C. 0.75
D. 0.9

Correct Answer: A

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Question 14
A 0.5 M solution of NaCl is prepared by dissolving 0.5 mol of NaCl in 1 L of water. What is the concentration of Cl- ions in the solution?
A. 0.25 M
Correct B. 0.5 M
C. 0.75 M
D. 1 M

Correct Answer: B

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Question 15
A population of bacteria is growing exponentially with a growth rate of 0.2 h-1. If the initial population is 100 cells, what is the population after 5 hours?
A. 1000 cells
Correct B. 5000 cells
C. 10000 cells
D. 20000 cells

Correct Answer: B

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Question 16
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. To regulate body temperature
Correct B. To stimulate the release of hormones from the pituitary gland
C. To control appetite and satiety
D. To regulate sleep-wake cycles

Correct Answer: B

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Question 17
A diagram of the human eye is shown below. 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 18
The process of osmoregulation in humans involves the regulation of which of the following?
A. Water balance
B. Sodium balance
C. Potassium balance
Correct D. All of the above

Correct Answer: D

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Question 19
A diagram of the cell cycle is shown below. Which phase of the cell cycle is characterized by DNA replication?
A. G1 phase
Correct B. S phase
C. G2 phase
D. M phase

Correct Answer: B

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Question 20
The process of mitosis in humans involves the separation of which of the following?
Correct A. Chromosomes
B. Cytokinesis
C. Mitochondria
D. Endoplasmic reticulum

Correct Answer: A

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Question 21
In the context of the nervous system, what is the primary function of the cerebellum?
A. To process sensory information
Correct B. To regulate muscle tone and coordination
C. To control voluntary movements
D. To facilitate learning and memory

Correct Answer: B

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Question 22
A patient with a severe case of diabetes mellitus is experiencing symptoms of ketoacidosis. Which of the following is a likely cause of this condition?
A. Insufficient insulin production
B. Inadequate glu\cose uptake by cells
C. Increased glucagon levels
Correct D. All of the above

Correct Answer: D

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Question 23
In the context of the circulatory system, what is the primary function of the coronary arteries?
A. To supply oxygenated blood to the lungs
B. To regulate blood pressure
Correct C. To supply oxygenated blood to the heart muscle
D. To filter waste products from the blood

Correct Answer: C

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Question 24
A patient with a severe case of tuberculosis is experiencing symptoms of respiratory failure. Which of the following is a likely cause of this condition?
A. Pulmonary fibrosis
B. Bronchial obstruction
C. Pulmonary embolism
Correct D. All of the above

Correct Answer: D

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Question 25
In the context of the \endocrine system, what is the primary function of the thyroid gland?
A. To regulate blood sugar levels
B. To regulate electrolyte balance
Correct C. To regulate metabolism
D. To regulate growth and development

Correct Answer: C

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