POST UTME UNIPORT 2024 Biology | Objective

Are you preparing for POST UTME UNIPORT 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.

Practice these randomly selected questions to test your readiness.

Question 1
In a tropical rainforest e\cosystem, what is the primary role of the decomposer community?
A. To produce organic compounds from inorganic subs\tances
Correct B. To break down complex organic molecules into simpler subs\tances
C. To synthesize new organic compounds from inorganic subs\tances
D. To form symbiotic relationships with other organisms

Correct Answer: B

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Question 2
A population of rabbits is growing according to the \logistic growth model. If the carrying capacity is 1000 individuals and the initial population is 100, what is the population size after 5 generations?
A. 100
B. 500
Correct C. 750
D. 1000

Correct Answer: C

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Question 3
A diagram of a plant cell is shown below. Identify the organelle responsible for protein synthesis.
A. Mitochondria
B. Endoplasmic reticulum
Correct C. Ribosomes
D. Golgi apparatus

Correct Answer: C

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Question 4
A genetic cross is performed between two organisms with the following genotypes: F1 = AaBb and F2 = aaBb. What is the probability that the offspring will have the genotype AaBb?
A. 0.25
Correct B. 0.5
C. 0.75
D. 1

Correct Answer: B

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Question 5
A diagram of the human kidney is shown below. Identify the structure responsible for filtering waste products from the blood.
Correct A. Glomerulus
B. Proximal convoluted tubule
C. Distal convoluted tubule
D. Collecting duct

Correct Answer: A

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Question 6
In a tropical rainforest e\cosystem, the primary consumers are primarily herbivores that feed on the abundant plant life. Which of the following is a characteristic of these primary consumers?
A. They have a high metabolic rate to quickly digest their food.
B. They have a low metabolic rate to conserve energy.
Correct C. They have a specialized digestive system to break down cellulose.
D. They have a large body size to intimidate predators.

Correct Answer: C

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Question 7
In the process of osmoregulation, the kidneys play a crucial role in maintaining the balance of electrolytes and water in the body. Which of the following is a function of the kidneys in osmoregulation?
A. To regulate the pH of the blood.
B. To remove excess ions from the blood.
Correct C. To produce antidiuretic hormone (ADH).
D. To regulate the concentration of glu\cose in the blood.

Correct Answer: C

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Question 8
In the xylem of a plant, the tracheids and vessels are responsible for transporting water and minerals from the roots to the leaves. Which of the following is a characteristic of the tracheids?
Correct A. They have a lignified secondary wall.
B. They have a thick primary wall.
C. They have a large diameter.
D. They have a branching pattern.

Correct Answer: A

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Question 9
In genetics, the Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation in the absence of certain factors. Which of the following is a factor that can cause a change in the frequency of alleles?
A. Mutation.
B. Genetic drift.
C. Gene flow.
Correct D. Natural selection.

Correct Answer: D

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Question 10
In the human eye, the retina contains specialized photoreceptor cells called rods and cones. Which of the following is a characteristic of the rods?
A. They are sensitive to color.
Correct B. They are sensitive to low light levels.
C. They are responsible for peripheral vision.
D. They are responsible for central vision.

Correct Answer: B

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Question 11
The diagram below shows 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 12
The Hardy-Weinberg principle states that the frequency of alleles in a population remains cons\tant from generation to generation. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No genetic drift
Correct D. All of the above

Correct Answer: D

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Question 13
The diagram below shows a simplified representation of the cell cycle. Which phase is characterized by DNA replication?
A. Mitosis
B. Interphase
C. G1
Correct D. S phase

Correct Answer: D

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Question 14
The following table shows the results of a genetic cross between two pea plants. What is the probability that a child of these two plants will be a tall plant?
A. 0.25
Correct B. 0.5
C. 0.75
D. 1.0

Correct Answer: B

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Question 15
The diagram below shows a cross-section of the human brain. Which part of the brain is responsible for controlling voluntary movements?
Correct A. Cerebrum
B. Cerebellum
C. Basal ganglia
D. Brainstem

Correct Answer: A

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Question 16
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
A. 100
Correct B. 200
C. 300
D. 400

Correct Answer: B

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Question 17
A 0.1 M solution of HCl is mixed with a 0.1 M solution of NaOH in a 1:1 ratio. What is the pH of the resulting solution?
A. 1
Correct B. 7
C. 10
D. 14

Correct Answer: B

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Question 18
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 19
A 5 kg block is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released, what is the maximum speed of the block?
A. 0.5 m/s
B. 1 m/s
Correct C. 2 m/s
D. 5 m/s

Correct Answer: C

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Question 20
A diagram of a simple harmonic motion is shown below. Identify the part labeled 'B'.
A. Spring
Correct B. Block
C. Equilibrium position
D. Maximum displacement

Correct Answer: B

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Question 21
In the process of osmoregulation, what is the primary mechanism by which the kidney regulates the concentration of ions in the blood?
A. Reabsorption of ions in the proximal convoluted tubule
B. Secretion of ions in the distal convoluted tubule
Correct C. Regulation of ion channels in the collecting duct
D. Excretion of ions in the urine

Correct Answer: C

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Question 22
What is the primary function of the mitochondria in the cell?
A. Protein synthesis
B. Cell signaling
Correct C. Energy production
D. Cell division

Correct Answer: C

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Question 23
In the process of respiration, what is the primary function of the electron transport chain?
Correct A. To generate ATP
B. To produce NADH
C. To reduce oxygen
D. To increase pH

Correct Answer: A

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Question 24
What is the primary mechanism by which the body regulates blood pressure?
Correct A. Renin-angioten\sin-aldosterone system
B. Sympathetic nervous system
C. Parasympathetic nervous system
D. Kidney function

Correct Answer: A

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Question 25
In the process of photosynthesis, what is the primary function of the thylakoid membrane?
Correct A. To absorb light energy
B. To produce ATP
C. To reduce NADP+
D. To increase pH

Correct Answer: A

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