POST UTME NILE UNIVERSITY 2023 Biology | Objective

Are you preparing for POST UTME NILE UNIVERSITY 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 the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Maintenance of blood pressure
C. Stimulation of the immune system
Correct D. Regulation of energy homeostasis

Correct Answer: D

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Question 2
A patient is diagnosed with a bacterial infection caused by Staphylococcus aureus. Which of the following antibiotics is most effective against this bacterium?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
Correct D. Vancomycin

Correct Answer: D

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Question 3
A researcher is studying the growth and development of a plant. Which of the following hormones is responsible for promoting cell elongation?
Correct A. Auxin
B. Gibberellin
C. Cytokinin
D. Ethylene

Correct Answer: A

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Question 4
A diagram of the human respiratory system is shown below. What is the primary function of the alveoli?
Correct A. Exchange of oxygen and carbon dioxide
B. Production of mucus
C. Regulation of body temperature
D. Maintenance of blood pressure

Correct Answer: A

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Question 5
A diagram of a simple e\cosystem is shown below. What is the primary role of the decomposers in this e\cosystem?
A. Primary producers
B. Primary consumers
Correct C. Decomposers
D. Omnivores

Correct Answer: C

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Question 6
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells is known as:
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Endoreduplication

Correct Answer: A

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Question 7
The diagram below shows a cross-section of a root hair cell. What is the function of the structure labeled 'A'?
Correct A. To absorb water and minerals from the soil
B. To transport sugars produced by photosynthesis
C. To store food for the plant
D. To support the plant's structure

Correct Answer: A

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Question 8
In a desert e\cosystem, what is the primary function of the 'A' layer in the soil profile?
Correct A. To store water for the plants
B. To support the growth of microorganisms
C. To filter out excess nutrients
D. To regulate soil temperature

Correct Answer: A

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Question 9
The process of excretion in humans involves the removal of waste products from the body through the:
Correct A. Kidneys
B. Liver
C. Lungs
D. Skin

Correct Answer: A

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Question 10
The diagram below shows a simplified representation of the human eye. What is the function of the structure labeled 'B'?
A. To focus light onto the retina
Correct B. To regulate the amount of light entering the eye
C. To detect movement
D. To perceive colors

Correct Answer: B

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Question 11
In a population of 1000 bacteria, 80% are resis\tant to antibiotic X. If 200 bacteria are randomly selected for treatment, what is the probability that at least 150 will be resis\tant to antibiotic X?
Correct A. 0.95
B. 0.90
C. 0.85
D. 0.80

Correct Answer: A

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Question 12
A cell in interphase has a DNA content of 2C. If the cell enters mitosis and divides to produce two daughter cells, what will be the DNA content of each daughter cell?
A. 1C
B. 2C
Correct C. 4C
D. 8C

Correct Answer: C

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Question 13
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 14
A diagram of a simple e\cosystem is shown below. Which of the following organisms is a primary consumer?
A. Plant
Correct B. Herbivore
C. Carnivore
D. Decomposer

Correct Answer: B

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Question 15
A diagram of a simple reproductive cycle is shown below. Which of the following organisms reproduces by budding?
A. Binary Fission
B. Mitosis
C. Meiosis
Correct D. Budding

Correct Answer: D

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Question 16
In a typical terrestrial e\cosystem, what is the primary function of the xylem in plants?
Correct A. Transport of water and minerals from the roots to the leaves
B. Transport of sugars and other organic compounds from the leaves to the roots
C. Regulation of water potential in the plant
D. Production of ATP in the plant

Correct Answer: A

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Question 17
A researcher is studying the effects of climate change on the distribution of species in a particular e\cosystem. Which of the following biomes is most likely to be affected by climate change?
A. Tropical rainforest
B. Temperate grassland
Correct C. Arctic tundra
D. Desert

Correct Answer: C

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Question 18
A patient is diagnosed with a condition that affects the growth and development of their sense organs. Which of the following conditions is most likely to be responsible?
Correct A. Hypothyroidism
B. Hyperthyroidism
C. Diabetes mellitus
D. Cushing's syndrome

Correct Answer: A

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Question 19
A researcher is studying the effects of a new medication on the cardiovascular system. Which of the following transport systems is most likely to be affected by the medication?
A. Xylem
B. Phloem
Correct C. Blood vessels
D. Lymphatic system

Correct Answer: C

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Question 20
A patient is diagnosed with a condition that affects the growth and development of their sense organs. Which of the following sense organs is most likely to be affected?
Correct A. Eye
B. Ear
C. Nose
D. Tongue

Correct Answer: A

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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. Stress response and adaptation
D. Regulation of appetite

Correct Answer: C

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Question 22
Asexual reproduction in plants can occur through the process of
A. fragmentation
Correct B. vegetative propagation
C. mutation
D. hybridization

Correct Answer: B

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Question 23
The process of gas exchange in the lungs involves the diffusion of oxygen into the blood and the diffusion of carbon dioxide out of the blood. What is the primary mechanism responsible for this process?
A. Active transport
B. Passive transport
C. Osmosis
Correct D. Diffusion

Correct Answer: D

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Question 24
The theory of evolution by natural selection proposes that populations of organisms change over time due to genetic variation and environmental pressures. What is the primary driving force behind this process?
A. Genetic drift
B. Mutation
C. Gene flow
Correct D. Natural selection

Correct Answer: D

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Question 25
The human body is composed of four main types of tissues: epithelial, connective, muscle, and nervous. What is the primary function of epithelial tissue?
A. Support and structure
B. Movement and contraction
Correct C. Protection and secretion
D. Conduction and transmission

Correct Answer: C

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