POST UTME UNILORIN 2024 Biology | Objective

Are you preparing for POST UTME UNILORIN exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2024 Biology (Objective) questions designed to simulate the real exam environment.

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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 is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?
Correct A. 0.8
B. 0.6
C. 0.4
D. 0.2

Correct Answer: A

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Question 2
A researcher is studying the effect of a new antibiotic on a bacterial culture. The culture is initially composed of 1000 bacteria, and the antibiotic reduces the population by 20% every hour. If the researcher wants to know the population after 3 hours, what is the population?
Correct A. 512
B. 640
C. 768
D. 896

Correct Answer: A

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Question 3
A diagram of the human brain is shown below. Which part of the brain is responsible for controlling voluntary movements?
Correct A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal Cord

Correct Answer: A

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Question 4
A study on the effect of a new hormone on the reproductive system found that the hormone increased the number of eggs released by the ovaries by 30%. If the initial number of eggs released was 100, what is the new number of eggs released?
A. 130
B. 140
Correct C. 150
D. 160

Correct Answer: C

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Question 5
A diagram of the human heart is shown below. Which part of the heart pumps blood to the lungs?
A. Right Ventricle
Correct B. Left Ventricle
C. Right Atrium
D. Left Atrium

Correct Answer: B

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Question 6
In the context of classification of living things, what is the primary function of the kingdom level?
Correct A. To group organisms based on their cell structure
B. To categorize organisms based on their genetic makeup
C. To classify organisms based on their body symmetry
D. To group organisms based on their metabolic processes

Correct Answer: A

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Question 7
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
Correct A. To focus light onto the retina
B. To detect changes in light intensity
C. To regulate the amount of light entering the eye
D. To produce tears to lubricate the eye

Correct Answer: A

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Question 8
In the context of growth and regulation, what is the primary function of the hypothalamus?
A. To regulate body temperature
B. To control hunger and thirst
Correct C. To stimulate the release of hormones
D. To regulate sleep and wakefulness

Correct Answer: C

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Question 9
A diagram of the human respiratory system is shown below. What is the function of the part labeled 'B'?
Correct A. To exchange oxygen and carbon dioxide
B. To regulate the amount of air entering the lungs
C. To produce mucus to lubricate the airways
D. To detect changes in air pressure

Correct Answer: A

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Question 10
In the context of microorganisms and diseases, what is the primary function of the immune system?
Correct A. To produce antibodies to fight infection
B. To regulate the amount of white blood cells
C. To stimulate the release of hormones
D. To regulate body temperature

Correct Answer: A

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Question 11
In a population of 1000 individuals, 60% are homozygous dominant (BB), 30% are heterozygous (Bb), and 10% are homozygous recessive (bb). If a random sample of 20 individuals is taken, what is the probability that at least 2 of them will be homozygous recessive?
A. 0.15
B. 0.25
Correct C. 0.35
D. 0.45

Correct Answer: C

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Question 12
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 0.15 m from its equilibrium position and released from rest. What is the speed of the block when it passes through the equilibrium position?
A. 0.5 m/s
B. 1.0 m/s
Correct C. 1.5 m/s
D. 2.0 m/s

Correct Answer: C

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Question 13
A certain species of bacteria doubles in population every 2 hours. If there are initially 100 bacteria, how many bacteria will there be after 6 hours?
A. 1600
B. 3200
C. 6400
Correct D. 12800

Correct Answer: D

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Question 14
A 5.0 kg block is moving with a speed of 2.0 m/s on a frictionless surface. If a force of 10 N is applied to the block, what is its acceleration?
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 15
A certain type of rock has a density of 2.5 g/cm^3. If a sample of this rock has a mass of 50 g, what is its volume?
A. 20 cm^3
B. 25 cm^3
Correct C. 30 cm^3
D. 35 cm^3

Correct Answer: C

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Question 16
The process of excretion in the human kidney involves the filtration of blood by the glomerulus, followed by the reabsorption of water and ions in the proximal convoluted tubule. Which of the following is the primary mechanism by which the kidney regulates the concentration of ions in the blood?
Correct A. Active transport
B. Passive transport
C. Osmosis
D. Diffusion

Correct Answer: A

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Question 17
The respiratory system is responsible for the exchange of gases between the environment and the body. Which of the following is the primary function of the alveoli in the lungs?
Correct A. To exchange oxygen and carbon dioxide
B. To regulate body temperature
C. To produce red blood cells
D. To filter waste products

Correct Answer: A

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Question 18
The classification of living things is based on their morpho\logy, physio\logy, and molecular characteristics. Which of the following is the primary criterion for the classification of organisms into kingdoms?
A. Cell wall composition
B. Cell membrane structure
Correct C. DNA structure and replication
D. Metabolic pathways

Correct Answer: C

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Question 19
Genetic variation is the raw material for evolution. Which of the following is the primary mechanism by which genetic variation is generated in a population?
Correct A. Mutation
B. Gene flow
C. Genetic drift
D. Natural selection

Correct Answer: A

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Question 20
Microorganisms are responsible for many diseases in humans. Which of the following is the primary mechanism by which bacteria cause disease?
A. Invasion of host cells
Correct B. Toxin production
C. Antibiotic resis\tance
D. Vaccine evasion

Correct Answer: B

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Question 21
The human respiratory system is responsible for the exchange of gases between the environment and the body. Which of the following is the primary function of the diaphragm in the respiratory system?
Correct A. To expand the chest cavity
B. To contract the chest cavity
C. To regulate body temperature
D. To produce red blood cells

Correct Answer: A

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Question 22
The human kidney is responsible for the regulation of electrolyte balance in the body. Which of the following is the primary mechanism by which the kidney regulates potassium levels in the blood?
Correct A. Active transport
B. Passive transport
C. Osmosis
D. Diffusion

Correct Answer: A

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Question 23
The human respiratory system is responsible for the exchange of gases between the environment and the body. Which of the following is the primary function of the alveoli in the lungs?
Correct A. To exchange oxygen and carbon dioxide
B. To regulate body temperature
C. To produce red blood cells
D. To filter waste products

Correct Answer: A

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Question 24
The human kidney is responsible for the regulation of electrolyte balance in the body. Which of the following is the primary mechanism by which the kidney regulates sodium levels in the blood?
Correct A. Active transport
B. Passive transport
C. Osmosis
D. Diffusion

Correct Answer: A

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Question 25
The human respiratory system is responsible for the exchange of gases between the environment and the body. Which of the following is the primary function of the bronchioles in the lungs?
A. To exchange oxygen and carbon dioxide
B. To regulate body temperature
C. To produce red blood cells
D. To filter waste products

Correct Answer: VIEW ANSWER

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