POST UTME VERITAS UNIVERSITY 2025 Biology | Objective

Are you preparing for POST UTME VERITAS UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2025 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1
In the context of osmoregulation, what is the primary function of the hormone vasopres\sin in the kidneys?
Correct A. To increase water reabsorption in the collecting ducts
B. To decrease water reabsorption in the collecting ducts
C. To increase sodium reabsorption in the proximal convoluted tubule
D. To decrease sodium reabsorption in the distal convoluted tubule

Correct Answer: A

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Question 2
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell's turgor pressure?
A. It will decrease due to water loss
Correct B. It will increase due to water uptake
C. It will remain the same
D. It will decrease due to solute uptake

Correct Answer: B

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Question 3
In the context of the xylem transport system, what is the primary function of the tracheids?
Correct A. To transport water and minerals from the roots to the leaves
B. To transport sugars and amino acids from the leaves to the roots
C. To provide structural support to the plant
D. To regulate gas exchange between the plant and the atmosphere

Correct Answer: A

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Question 4
A diagram of the human respiratory system is shown below:
A. The trachea is responsible for gas exchange
B. The diaphragm is responsible for gas exchange
Correct C. The lungs are responsible for gas exchange
D. The pharynx is responsible for gas exchange

Correct Answer: C

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Question 5
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 regulate autonomic functions

Correct Answer: B

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Question 6
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the protein kinase Cdk1. What is the primary function of Cdk1 in this process?
Correct A. To phosphorylate and activate the anaphase-promoting complex (APC)
B. To bind to and inhibit the activity of the nuclear lamina
C. To regulate the activity of the spindle checkpoint
D. To control the condensation of chromatin

Correct Answer: A

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Question 7
A plant cell is placed in a solution with a high concentration of sucrose. What is the expected effect on the cell's turgor pressure?
A. The cell will experience a decrease in turgor pressure
Correct B. The cell will experience an increase in turgor pressure
C. The cell will remain unchanged
D. The cell will experience a decrease in cell volume

Correct Answer: B

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Question 8
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 9
A solution of glu\cose is placed in a dialysis bag and submerged in a solution of urea. What is the expected movement of water molecules?
A. Water molecules will move from the solution of urea into the dialysis bag
Correct B. Water molecules will move from the dialysis bag into the solution of urea
C. Water molecules will remain unchanged
D. Water molecules will move equally in both directions

Correct Answer: B

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Question 10
A diagram of the human brain is shown below. What is the function of the part labeled 'B'?
A. To regulate body temperature
Correct B. To control voluntary movements
C. To process sensory information
D. To produce hormones

Correct Answer: B

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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?
Correct A. 0.8
B. 0.6
C. 0.4
D. 0.2

Correct Answer: A

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Question 12
A researcher is studying the effect of pH on the growth of Escherichia coli. The researcher measures the growth rate of the bacteria at different pH levels and obtains the following data:
Correct A. The growth rate increases with increa\sing pH.
B. The growth rate decreases with increa\sing pH.
C. The growth rate remains cons\tant with increa\sing pH.
D. The growth rate is unaffected by pH.

Correct Answer: A

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Question 13
A population of 1000 rabbits is introduced to a new island. The population grows according to the \logistic growth model \( \frac{dP}{dt} = rP \left\( 1 - \frac{P}{K} \right \), where \( r = 0.1 \) and \( K = 2000 \). Find the population size at time \( t = 10 \) years.
A. 1200
B. 1500
Correct C. 1800
D. 2000

Correct Answer: C

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Question 14
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:
Correct A. The rate increases with increa\sing temperature.
B. The rate decreases with increa\sing temperature.
C. The rate remains cons\tant with increa\sing temperature.
D. The rate is unaffected by temperature.

Correct Answer: A

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Question 15
A population of 1000 bacteria is introduced to a new environment. The population grows according to the exponential growth model \( P(t) = P_0 e^{rt} \), where \( P_0 = 1000 \) and \( r = 0.1 \). Find the population size at time \( t = 10 \) years.
Correct A. 10000
B. 20000
C. 30000
D. 40000

Correct Answer: A

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Question 16
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
B. To pump protons across the mitochondrial inner membrane
C. To reduce NAD+ to NADH
Correct D. To generate a proton gradient for ATP synthesis

Correct Answer: D

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Question 17
A genetic cross between two organisms results in a 9:3:3:1 ratio of phenotypes. What is the genotype of the parents?
A. Both parents are homozygous dominant
B. One parent is homozygous dominant and the other is homozygous recessive
Correct C. Both parents are heterozygous
D. One parent is homozygous dominant and the other is heterozygous

Correct Answer: C

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Question 18
A cell is in the M phase of the cell cycle. What is the primary function of the mitotic spindle?
Correct A. To separate chromosomes during anaphase
B. To align chromosomes during prophase
C. To condense chromosomes during prophase
D. To decondense chromosomes during telophase

Correct Answer: A

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Question 19
A tissue is composed of a mixture of epithelial and connective tissue. What is the primary function of the epithelial tissue?
A. To provide structural support
B. To produce hormones
Correct C. To form a barrier against external factors
D. To store nutrients

Correct Answer: C

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Question 20
A kidney is filtering waste products from the blood. What is the primary function of the glomerulus?
Correct A. To filter waste products from the blood
B. To regulate blood pressure
C. To produce hormones
D. To store waste products

Correct Answer: A

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Question 21
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' for black eyes is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
A. 0.16
B. 0.36
Correct C. 0.64
D. 0.84

Correct Answer: C

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Question 22
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 23
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
Correct A. photosynthesis
B. respiration
C. cell division
D. cell signaling

Correct Answer: A

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Question 24
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 20% per hour, what is the population size after 3 hours?
A. 200
Correct B. 266.67
C. 333.33
D. 400

Correct Answer: B

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Question 25
A diagram of a neuron is shown below. What is the function of the structure labeled 'B'?
A. synapse
Correct B. axon
C. d\endrite
D. cell body

Correct Answer: B

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