POST UTME UNILORIN 2023 Biology | Objective

Are you preparing for POST UTME UNILORIN exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2023 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a typical human kidney, which of the following structures is responsible for the reabsorption of glu\cose from the filtrate?
Correct A. Proximal convoluted tubule
B. Distal convoluted tubule
C. Loop of Henle
D. Collecting duct

Correct Answer: A

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Question 2
A diagram of the human eye is shown below. Which of the following statements is true regarding the structure labeled 'A'?
A. It is responsible for detecting light
Correct B. It is responsible for focu\sing light
C. It is responsible for detecting color
D. It is responsible for detecting movement

Correct Answer: B

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Question 3
In the context of cellular respiration, which of the following equations represents the overall equation for the process?
Correct A. \( C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O \)
B. \( C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O_2 \)
C. \( C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2 \)
D. \( C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O_2 \)

Correct Answer: A

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Question 4
A diagram of a typical human brain is shown below. Which of the following structures is responsible for controlling voluntary movements?
Correct A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal cord

Correct Answer: A

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Question 5
In the context of eco\logy, which of the following biomes is characterized by a tropical rainforest climate?
Correct A. Tropical rainforest
B. Desert
C. Temperate grassland
D. Boreal forest

Correct Answer: A

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Question 6
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, calculate the frequency of the dominant allele 'R'.
Correct A. 0.8
B. 0.6
C. 0.4
D. 0.2

Correct Answer: A

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Question 7
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
Correct A. 0.5
B. 0.25
C. 0.75
D. 0.33

Correct Answer: A

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Question 8
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 9
A diagram of the human respiratory system is shown below. Which part of the system is responsible for exchanging oxygen and carbon dioxide?
A. Lungs
B. Trachea
C. Bronchi
Correct D. Alveoli

Correct Answer: D

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Question 10
A diagram of the human circulatory system is shown below. Which part of the system is responsible for pumping blood throughout the body?
Correct A. Heart
B. Arteries
C. Veins
D. Capillaries

Correct Answer: A

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Question 11
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
A. To store water and minerals
Correct B. To transport water and minerals
C. To regulate water and mineral uptake
D. To break down organic matter

Correct Answer: B

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Question 12
What is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic drift
C. Gene flow
Correct D. Heritability

Correct Answer: D

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Question 13
In the context of eco\logy, what is the term for the relationship between two species in which one species benefits and the other is harmed?
A. Mutualism
B. Commensalism
Correct C. Parasitism
D. Predation

Correct Answer: C

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Question 14
What is the term for the process by which an organism's genetic information is altered by external factors?
Correct A. Mutation
B. Genetic drift
C. Gene flow
D. Epigenetics

Correct Answer: A

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Question 15
In the context of eco\logy, what is the term for the movement of organisms from one habitat to another?
Correct A. Migration
B. Emigration
C. Immigration
D. Habitat fragmentation

Correct Answer: A

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Question 16
In the process of osmoregulation, which of the following organs plays a crucial role in maintaining the balance of electrolytes and water in the body?
Correct A. Kidneys
B. Liver
C. Pancreas
D. Adrenal Glands

Correct Answer: A

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Question 17
A cell is placed in a hypertonic solution. What will happen to the cell?
Correct A. The cell will swell and eventually burst.
B. The cell will shrink and lose water.
C. The cell will remain unchanged.
D. The cell will undergo mitosis.

Correct Answer: A

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Question 18
Which of the following is a characteristic of a prokaryotic cell?
A. Presence of a true nucleus
B. Presence of mitochondria
Correct C. Lack of a true nucleus
D. Presence of a cell wall

Correct Answer: C

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Question 19
What is the primary function of the mitochondria in a cell?
A. To synthesize proteins
B. To store genetic information
Correct C. To generate energy for the cell
D. To regulate cell growth

Correct Answer: C

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Question 20
Which of the following is an example of a symbiotic relationship?
A. Predator-prey relationship
B. Competitive relationship
Correct C. Mutualistic relationship
D. Parasitic relationship

Correct Answer: C

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Question 21
In a population of 1000 individuals, 200 are infected with a disease that has a 20% mortality rate. If 50% of the infected individuals are asymptomatic, what is the expected number of deaths due to the disease?
A. 80
Correct B. 100
C. 120
D. 140

Correct Answer: B

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Question 22
A plant has a root system that consists of 5 primary roots and 10 secondary roots. If each primary root has 5 tertiary roots, how many roots are there in total?
A. 35
B. 40
C. 45
Correct D. 50

Correct Answer: D

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Question 23
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 light intensity
C. To regulate pupil size
D. To produce tears

Correct Answer: A

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Question 24
A diagram of the human circulatory system is shown below. What is the function of the part labeled 'B'?
A. To pump blood to the lungs
Correct B. To carry oxygenated blood to the body
C. To regulate blood pressure
D. To produce blood cells

Correct Answer: B

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Question 25
A diagram of the human respiratory system is shown below. What is the function of the part labeled 'C'?
A. To expand and contract during breathing
B. To regulate air pressure
Correct C. To separate oxygen from carbon dioxide
D. To produce mucus

Correct Answer: C

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