POST UTME ABU 2019 Biology | Objective

Are you preparing for POST UTME ABU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2019 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 evolutionary theory, what is the primary mechanism by which natural selection acts on genetic variation?
A. Genetic drift
B. Gene flow
C. Mutation
Correct D. Differential reproduction

Correct Answer: D

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Question 2
The diagram below shows a cross-section of a plant root. What is the function of the xylem tissue in this region?
Correct A. Transport of water and minerals from the soil to the leaves
B. Storage of nutrients and water
C. Support and structure for the plant
D. Production of hormones

Correct Answer: A

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Question 3
In the context of excretion and osmoregulation, what is the primary function of the kidneys in the human body?
A. Regulation of blood pressure
Correct B. Removal of waste products from the blood
C. Maintenance of electrolyte balance
D. Production of hormones

Correct Answer: B

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Question 4
The diagram below shows a cross-section of a human heart. What is the function of the atrioventricular (AV) node in this region?
A. Regulation of heart rate
Correct B. Conduction of electrical impulses
C. Production of hormones
D. Storage of nutrients

Correct Answer: B

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Question 5
In the context of growth and regulation, what is the primary mechanism by which cells grow and divide?
Correct A. Mitosis
B. Meiosis
C. Apoptosis
D. Differentiation

Correct Answer: A

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Question 6
In the process of osmoregulation, what is the primary function of the kidneys in a hypertonic environment?
A. To excrete excess water
Correct B. To reabsorb excess ions
C. To regulate blood pH
D. To maintain electrolyte balance

Correct Answer: B

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Question 7
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 8
In the process of cellular respiration, what is the primary function of the mitochondria?
Correct A. To generate ATP
B. To synthesize proteins
C. To store genetic information
D. To regulate cell growth

Correct Answer: A

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Question 9
Which of the following is a type of sensory receptor found in the human eye?
Correct A. Photoreceptor
B. Mechanoreceptor
C. Thermoreceptor
D. Electroreceptor

Correct Answer: A

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Question 10
In the process of mitosis, what is the primary function of the spindle fibers?
Correct A. To separate chromosomes
B. To align chromosomes
C. To attach chromosomes to the spindle pole
D. To regulate cell growth

Correct Answer: A

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Question 11
In a diploid cell, what is the total number of chromosomes if the cell has 22 pairs of autosomal chromosomes and 1 pair of sex chromosomes?
A. 44
Correct B. 46
C. 48
D. 50

Correct Answer: B

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Question 12
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 13
A diagram shows a plant cell with a large vacuole. What is the function of the vacuole?
A. Storage of nutrients and waste products.
Correct B. Regulation of cell turgor pressure.
C. Maintenance of cell shape.
D. Production of cell wall components.

Correct Answer: B

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Question 14
A diagram shows a human eye with a lens that is convex. What is the function of the lens?
Correct A. To focus light on the retina.
B. To scatter light in all directions.
C. To absorb light energy.
D. To reflect light away from the eye.

Correct Answer: A

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Question 15
A diagram shows a neuron with a long axon. What is the function of the axon?
Correct A. To transmit signals to other neurons.
B. To synthesize neurotransmitters.
C. To store genetic information.
D. To regulate cell growth.

Correct Answer: A

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Question 16
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 fluid balance
Correct C. Response to stress and anxiety
D. Regulation of appetite and satiety

Correct Answer: C

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Question 17
A diagram of the xylem and phloem tissues in a plant stem is shown below. What is the primary function of the xylem tissue?
Correct A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Support and structure of the plant
D. Regulation of plant growth

Correct Answer: A

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Question 18
In the classification of living things, what is the primary characteristic that distinguishes prokaryotic cells from eukaryotic cells?
Correct A. Presence of a true nucleus
B. Presence of mitochondria
C. Presence of a cell wall
D. Size of the cell

Correct Answer: A

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Question 19
A diagram of the human circulatory system is shown below. What is the primary function of the coronary arteries?
Correct A. Transport of oxygenated blood to the heart
B. Transport of deoxygenated blood from the heart
C. Regulation of heart rate
D. Maintenance of blood pressure

Correct Answer: A

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Question 20
In the context of genetics, what is the primary function of the gene regulatory elements?
Correct A. Regulation of gene expression
B. Maintenance of genome stability
C. Repair of DNA damage
D. Synthesis of proteins

Correct Answer: A

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Question 21
In a cell undergoing meiosis, what is the result of cros\sing over between homo\logous chromosomes?
Correct A. Increased genetic variation
B. Decreased genetic variation
C. No effect on genetic variation
D. Increased genetic drift

Correct Answer: A

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Question 22
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 23
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 produce neurotransmitters
D. To synthesize proteins

Correct Answer: A

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Question 24
A diagram of a plant's xylem is shown below. What is the function of the part labeled 'E'?
Correct A. To transport water and minerals
B. To transport sugars and amino acids
C. To produce chlorophyll
D. To synthesize cellulose

Correct Answer: A

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Question 25
A diagram of a human respiratory system is shown below. What is the function of the part labeled 'F'?
Correct A. To transport oxygen to the body
B. To transport carbon dioxide from the body
C. To regulate breathing
D. To synthesize surfac\tant

Correct Answer: A

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