POST UTME BSU 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The diagram below represents a cross-section of a plant leaf. Identify the structure labeled B.
A. Stomata
B. Guard cells
C. Palisade cells
D. Spongy cells
Question 2
The diagram below represents a cross-section of a plant root. Identify the structure labeled D.
A. Endodermis
B. Pericycle
C. Xylem
D. Phloem
Question 3
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 genetic makeup
C. To group organisms based on their body structure
D. To group organisms based on their habitat
Question 4
The diagram below represents a cross-section of a plant stem. Identify the structure labeled C.
A. Xylem
B. Phloem
C. Cortex
D. Pith
Question 5
The diagram below represents a cross-section of a plant leaf. Identify the structure labeled E.
A. Stomata
B. Guard cells
C. Palisade cells
D. Spongy cells
Question 6
What is the primary mechanism by which the stomata regulate gas exchange?
A. By increa\sing the rate of transpiration
B. By increa\sing the rate of photosynthesis
C. By regulating the rate of gas exchange through the opening and clo\sing of stomata
D. By increa\sing the rate of respiration
Question 7
In the context of classification of living things, what is the primary function of the species level?
A. To group organisms based on their genetic makeup
B. To group organisms based on their cell structure
C. To group organisms based on their body structure
D. To group organisms based on their habitat
Question 8
In the context of sense organs, what is the primary function of the olfactory epithelium?
A. To detect changes in air pressure
B. To detect changes in temperature
C. To detect odor molecules
D. To detect sound waves
Question 9
In a eukaryotic cell, the process of cytokinesis is initiated by the contraction of which protein complex?
A. Actin-myo\sin complex
B. Microtubule-based motor proteins
C. Intermediate filaments
D. Microtubule organizing center
Question 10
A researcher is studying the effect of temperature on the rate of photosynthesis in a plant. If the rate of photosynthesis is 12.5 μmol CO2 s-1 at 25°C, and the rate increases by 2.5% for every 1°C increase in temperature, what is the rate of photosynthesis at 35°C?
A. 15
B. 17.5
C. 20
D. 22.5
Question 11
A diagram of a human nervous system is shown below. Which part of the nervous system is responsible for controlling voluntary movements?
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal cord
Question 12
The process by which plants release water vapor into the air is called
A. Transpiration
B. Respiration
C. Photosynthesis
D. Evaporation
Question 13
The process by which plants release excess heat through their leaves is called
A. Transpiration
B. Respiration
C. Photosynthesis
D. Evaporation
Question 14
In the context of photosynthesis, which of the following is a byproduct of the light-dep\endent reactions?
A. ATP
B. NADPH
C. O2
D. H2O
Question 15
In a typical animal cell, the Golgi apparatus is responsible for modifying which type of molecule?
A. Proteins
B. Lipids
C. Carbohydrates
D. Nucleic acids

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