POST UTME PAN-ATLANTIC UNIVERSITY 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant cell has a volume of 10.0 μL and a surface area of 100.0 μm^2. If the cell is subjected to a pressure of 1.0 atm, what is the resulting change in volume?
A. 10.0 μL
B. 20.0 μL
C. 30.0 μL
D. 40.0 μL
Question 2
Which of the following sense organs is responsible for detecting changes in blood pressure?
A. Eustachian tube
B. Aortic body
C. Carotid body
D. Baroreceptor
Question 3
The diagram below shows a cross-section of a plant root. Which of the following structures is responsible for the absorption of water and minerals from the soil?
A. The epidermis.
B. The cortex.
C. The \endodermis.
D. The xylem.
Question 4
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. To synthesize proteins
B. To store genetic information
C. To regulate cell growth
D. To transport materials across the cell membrane
Question 5
The diagram below shows a cross-section of a human eye. Which of the following is the primary function of the retina?
A. Focu\sing light onto the retina
B. Detecting light and converting it into electrical signals
C. Regulating the amount of light that enters the eye
D. Supporting the structure of the eye
Question 6
In the context of excretion and osmoregulation, what is the primary function of the kidneys?
A. To regulate blood pH levels
B. To regulate blood pressure
C. To regulate electrolyte balance
D. To regulate fluid balance
Question 7
Which of the following reproductive strategies is characteristic of bacteria?
A. Asexual reproduction
B. Sexual reproduction
C. Binary fission
D. Mitosis
Question 8
The diagram below shows a cross-section of the human brain. Which of the following structures is responsible for the transmission of nerve impulses from the sensory receptors to the spinal cord?
A. The cerebrum.
B. The cerebellum.
C. The spinal cord.
D. The sensory receptors.
Question 9
A species of bird is known to migrate between two different habitats. Which of the following types of eco\logical niches would best describe the bird's role in the e\cosystem?
A. Competition niche
B. Predator-prey niche
C. Resource partitioning niche
D. Niche differentiation niche
Question 10
In the context of classification of living things, what is the primary function of the kingdom level?
A. To group organisms based on their cell structure
B. To group organisms based on their body symmetry
C. To group organisms based on their metabolic processes
D. To group organisms based on their genetic makeup
Question 11
In a tropical rainforest e\cosystem, the primary producers are plants that undergo photosynthesis. Which of the following is a characteristic of the photosynthetic pathway in these plants?
A. C4 pathway
B. CAM pathway
C. C3 pathway
D. Crassulacean acid metabolism pathway
Question 12
A diagram of the human eye is shown below. What is the function of the structure labeled 'B'?
A. To focus light on the retina
B. To regulate pupil size
C. To detect color
D. To perceive depth
Question 13
A solution of 0.1 M glu\cose is prepared by dissolving 10 g of glu\cose in 100 mL of water. What is the concentration of the solution in g/L?
A. 50
B. 100
C. 150
D. 200
Question 14
A 5.0 g sample of a subs\tance is dissolved in 100.0 mL of water. If the resulting solution has a concentration of 0.50 M, what is the molar mass of the subs\tance?
A. 100.0 g/mol
B. 200.0 g/mol
C. 300.0 g/mol
D. 400.0 g/mol
Question 15
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. cell wall
B. cell membrane
C. nucleus
D. cytoplasm

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