POST UTME AFE BABALOLA UNIVERSITY 2025 Biology | Objective

Are you preparing for POST UTME AFE BABALOLA 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 photosynthesis, what is the role of the enzyme RuBisCO in the Calvin cycle?
Correct A. It catalyzes the fixation of CO2 into a 3-carbon molecule
B. It is involved in the light-dep\endent reactions of photosynthesis
C. It is a key enzyme in the breakdown of glu\cose during respiration
D. It is responsible for the absorption of light energy in photosystem II

Correct Answer: A

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Question 2
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
Correct A. To focus light on the retina
B. To detect movement in the visual field
C. To regulate the amount of light entering the eye
D. To correct for nearsightedness

Correct Answer: A

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Question 3
In the context of digestion, what is the primary function of the enzyme amylase?
A. To break down proteins into amino acids
Correct B. To break down carbohydrates into simple sugars
C. To break down fats into fatty acids and glycerol
D. To break down nucleic acids into nucleotides

Correct Answer: B

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Question 4
A diagram of the human reproductive system is shown below. What is the function of the part labeled 'B'?
A. To produce sperm
Correct B. To produce eggs
C. To store sperm
D. To transport sperm

Correct Answer: B

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Question 5
In the context of asexual reproduction, what is the primary advantage of budding in yeast?
A. It allows for the production of multiple offspring
B. It increases the genetic diversity of the population
Correct C. It is a rapid method of reproduction
D. It allows for the production of offspring with unique characteristics

Correct Answer: C

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Question 6
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. Regulation of body temperature
B. Control of hunger and thirst
Correct C. Stimulation of the pituitary gland
D. Regulation of blood pressure

Correct Answer: C

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Question 7
What is the process by which a cell divides into two daughter cells, each with the same number of chromosomes as the parent cell?
Correct A. Mitosis
B. Meiosis
C. Binary fission
D. Endoreduplication

Correct Answer: A

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Question 8
Which of the following sense organs is responsible for detecting changes in sound waves?
A. Eye
Correct B. Ear
C. Nose
D. Tongue

Correct Answer: B

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Question 9
What is the term for the process by which an organism grows and develops from a \single cell?
A. Mitosis
B. Meiosis
C. Differentiation
Correct D. Embryogenesis

Correct Answer: D

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Question 10
What is the term for the pas\sing of traits from parents to offspring through the transmission of genetic information?
Correct A. Heredity
B. Variation
C. Mutation
D. Genetic drift

Correct Answer: A

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Question 11
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following statements is FALSE regarding the electron transport chain?
A. The electron transport chain is the site of oxidative phosphorylation.
B. The electron transport chain is located in the mitochondria.
C. The electron transport chain produces ATP by pumping protons across the mitochondrial membrane.
Correct D. The electron transport chain is the site of substrate-level phosphorylation.

Correct Answer: D

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Question 12
The Hardy-Weinberg principle states that genetic variation in a population will remain cons\tant from generation to generation if certain conditions are met. Which of the following is NOT one of the conditions for the Hardy-Weinberg principle?
Correct A. Large population size
B. Random mating
C. No mutation
D. No gene flow

Correct Answer: A

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Question 13
The nervous system is responsible for transmitting signals from sensory receptors to the brain. Which of the following types of neurons is responsible for transmitting signals from sensory receptors to the spinal cord?
A. Motor neuron
Correct B. Sensory neuron
C. Interneuron
D. Association neuron

Correct Answer: B

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Question 14
The process of photosynthesis involves the conversion of light energy into chemical energy. Which of the following is NOT a reac\tant in the light-dep\endent reactions?
A. Water
B. Carbon dioxide
C. Light energy
Correct D. Glu\cose

Correct Answer: D

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Question 15
The hormone insulin is responsible for regulating blood glu\cose levels. Which of the following is a consequence of insulin deficiency?
Correct A. Increased blood glu\cose levels
B. Decreased blood glu\cose levels
C. Increased blood pressure
D. Decreased blood pressure

Correct Answer: A

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Question 16
In a tropical rainforest biome, the high levels of rainfall and temperature support a diverse array of plant and animal life. Which of the following is a characteristic of the nutrient cycle in this biome?
A. High levels of nutrient leaching into the soil
B. Low levels of nutrient cycling due to the high levels of rainfall
Correct C. High levels of nutrient retention in the vegetation
D. Low levels of nutrient availability due to the high levels of decomposition

Correct Answer: C

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Question 17
A species of plant has a growth rate of \( \frac{dN}{dt} = rN\( 1 - \frac{N}{K} \ \) ), where ( r ) is the intrinsic growth rate and ( K ) is the carrying capacity. What is the value of ( N ) when the population size is at its maximum?
A. 0
Correct B. K
C. r
D. 1

Correct Answer: B

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Question 18
In a photosynthetic reaction, the equation is \( 6CO_2 + 6H_2O + light energy \rightarrow C_6H_{12}O_6 + 6O_2 \). What is the byproduct of this reaction?
Correct A. Oxygen
B. Carbon dioxide
C. Water
D. Glu\cose

Correct Answer: A

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Question 19
A diagram of a plant cell is shown below. What is the function of the cell wall?
Correct A. To provide structural support to the cell
B. To regulate the movement of materials in and out of the cell
C. To synthesize proteins
D. To store genetic information

Correct Answer: A

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Question 20
A diagram of a human respiratory system is shown below. What is the function of the trachea?
Correct A. To transport oxygen to the lungs
B. To transport carbon dioxide from the lungs
C. To regulate the temperature of the body
D. To synthesize proteins

Correct Answer: A

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Question 21
In a xylem vessel, what is the primary function of the lignin in the cell walls?
Correct A. To provide structural support to the vessel
B. To facilitate the transport of water and minerals
C. To regulate the rate of transpiration
D. To store nutrients and water

Correct Answer: A

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Question 22
What is the term for the process by which plants convert light energy into chemical energy?
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmosis

Correct Answer: A

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Question 23
In a cell undergoing mitosis, what is the stage where the chromosomes are condensed and attached to the spindle fibers?
A. Prophase
Correct B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: B

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Question 24
What is the term for the movement of water from the roots to the leaves through the xylem?
Correct A. Transpiration
B. Translocation
C. Osmosis
D. Diffusion

Correct Answer: A

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Question 25
In a human kidney, what is the primary function of the glomerulus?
Correct A. To filter waste products from the blood
B. To regulate the amount of water in the blood
C. To produce hormones that control blood pressure
D. To store waste products for excretion

Correct Answer: A

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