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POST UTME UNILAG 2024 Biology | Objective

Are you preparing for POST UTME UNILAG 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.

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Question 1

In a population of 1000 individuals, the frequency of the dominant allele is 0.6. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the recessive allele?

Correct A. 0.4

B. 0.2

C. 0.8

D. 0.1

Correct Answer: A

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Question 2

A cell is placed in a solution with a pH of 5.5. If the cell membrane has a permeability coefficient of 0.01 cm/s, what is the rate of diffusion of H+ ions across the membrane?

Correct A. 0.05 cm/s

B. 0.01 cm/s

C. 0.005 cm/s

D. 0.001 cm/s

Correct Answer: A

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Question 3

A diagram of a plant cell is shown below. Identify the part labeled A.

Correct A. Mitochondria

B. Nucleus

C. Chloroplast

D. Vacuole

Correct Answer: A

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Question 4

A diagram of a simple e\cosystem is shown below. Identify the role of the producer in the e\cosystem.

A. Primary consumer

B. Decomposer

Correct C. Producer

D. Secondary consumer

Correct Answer: C

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Question 5

A diagram of a simple circuit is shown below. Identify the component labeled A.

Correct A. Resistor

B. Battery

C. Capacitor

D. Inductor

Correct Answer: A

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Question 6

In the context of evolutionary theory, what is the primary mechanism by which genetic drift leads to the fixation of a deleterious mutation?

Correct A. Genetic hitchhiking

B. Genetic linkage

C. Genetic recombination

D. Genetic mutation

Correct Answer: A

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Question 7

A researcher is studying the effects of antibiotic resis\tance in a bacterial population. Which of the following is a likely consequence of the spread of antibiotic resis\tance?

A. Increased virulence

B. Decreased infectivity

C. Increased transmissibility

Correct D. Reduced antibiotic efficacy

Correct Answer: D

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Question 8

A diagram of the human eye is shown below. What is the function of the structure labeled 'A'?

Correct A. To focus light on the retina

B. To detect movement

C. To regulate pupil size

D. To produce tears

Correct Answer: A

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Question 9

A plant growth regulator is shown below. What is the likely effect of this regulator on plant growth?

A. Increased cell elongation

Correct B. Increased cell division

C. Increased cell differentiation

D. Increased cell death

Correct Answer: B

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Question 10

A diagram of a reproductive cell is shown below. What is the function of the structure labeled 'B'?

Correct A. To fuse with another gamete

B. To undergo meiosis

C. To undergo mitosis

D. To produce a zygote

Correct Answer: A

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Question 11

In the context of evolutionary theories, what is the primary mechanism driving the process of speciation in a population of organisms?

A. Genetic drift

Correct B. Natural selection

C. Gene flow

D. Mutation

Correct Answer: B

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Question 12

A diagram of the human respiratory system is shown below. Which of the following structures is responsible for the exchange of oxygen and carbon dioxide?

A. Trachea

Correct B. Lungs

C. Diaphragm

D. Bronchi

Correct Answer: B

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Question 13

In a population of organisms, what is the term for the process by which individuals with favorable traits are more likely to survive and reproduce?

Correct A. Natural selection

B. Genetic drift

C. Gene flow

D. Mutation

Correct Answer: A

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Question 14

A diagram of the human digestive system is shown below. Which of the following structures is responsible for the breakdown of proteins?

A. Mouth

Correct B. Stomach

C. Small intestine

D. Pancreas

Correct Answer: B

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Question 15

In the context of evolutionary theories, what is the term for the process by which a new species emerges from an existing one?

Correct A. Speciation

B. Genetic drift

C. Gene flow

D. Mutation

Correct Answer: A

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Question 16

In a photosynthetic pathway, what is the primary function of the enzyme RuBisCO?

Correct A. Fixation of CO2

B. Reduction of CO2

C. Oxidation of CO2

D. Decarboxylation of CO2

Correct Answer: A

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Question 17

A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?

A. The cell will shrink due to water loss

Correct B. The cell will swell due to water uptake

C. The cell will remain unchanged

D. The cell will burst due to osmotic pressure

Correct Answer: B

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Question 18

A diagram of a neuron is shown below. What is the function of the part labeled 'D'?

Correct A. To transmit signals to other neurons

B. To receive signals from other neurons

C. To synthesize neurotransmitters

D. To degrade neurotransmitters

Correct Answer: A

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Question 19

A diagram of a plant root system is shown below. What is the function of the part labeled 'E'?

A. To absorb water and minerals

Correct B. To transport water and minerals

C. To synthesize chlorophyll

D. To store starch

Correct Answer: B

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Question 20

A diagram of a human respiratory system is shown below. What is the function of the part labeled 'F'?

A. To conduct air to the lungs

B. To conduct air from the lungs

Correct C. To exchange oxygen and carbon dioxide

D. To regulate breathing rate

Correct Answer: C

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Question 21

In the context of hormonal coordination, what is the primary function of the hypothalamus-pituitary-adrenal (HPA) axis?

A. Regulation of body temperature

B. Maintenance of blood pressure

Correct C. Response to stress and anxiety

D. Regulation of appetite and satiety

Correct Answer: C

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Question 22

A diagram of the human brain is shown below. Which part of the brain is responsible for proces\sing visual information?

A. Frontal lobe

B. Parietal lobe

C. Temporal lobe

Correct D. Occipital lobe

Correct Answer: D

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Question 23

A cell is shown below. What is the primary function of the mitochondria in this cell?

A. Protein synthesis

B. Cell signaling

Correct C. Energy production

D. Cell division

Correct Answer: C

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Question 24

A diagram of the human kidney is shown below. Which part of the kidney is responsible for filtering waste products from the blood?

Correct A. Cortex

B. Medulla

C. Papilla

D. Renal pelvis

Correct Answer: A

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Question 25

A diagram of the human heart is shown below. Which part of the heart is responsible for pumping blood to the lungs?

A. Right atrium

Correct B. Left atrium

C. Right ventricle

D. Left ventricle

Correct Answer: B

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