POST UTME AAUA 2019 Biology | Objective

Are you preparing for POST UTME AAUA 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 a diploid cell, what is the total number of chromosomes in the zygote?
Correct A. 46
B. 23
C. 92
D. 48

Correct Answer: A

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Question 2
A plant cell undergoes mitosis. Which of the following is a characteristic of the daughter cells?
A. Increased ploidy
B. Decreased ploidy
Correct C. Same ploidy
D. No change in ploidy

Correct Answer: C

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Question 3
A diagram of a cell is shown below. What is the function of the structure labeled 'A'?
A. Mitochondria
Correct B. Nucleus
C. Endoplasmic reticulum
D. Lysosome

Correct Answer: B

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Question 4
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 2% per hour, what is the population size after 5 hours?
A. 1000
B. 500
Correct C. 2000
D. 3000

Correct Answer: C

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Question 5
A diagram of a chemical reaction is shown below. What is the product of the reaction?
Correct A. H2O
B. CO2
C. CH4
D. NH3

Correct Answer: A

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Question 6
The process of cellular respiration can be represented by the following equation: \( C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + ATP \). What is the overall equation for the production of ATP in cellular respiration?
A. ATP + H_2O + CO_2
B. ATP + O_2 + H_2O
C. ATP + C_6H_{12}O_6 + O_2
Correct D. ATP + CO_2 + H_2O

Correct Answer: D

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Question 7
In the context of evolutionary theory, what is the term for the process by which a species becomes better suited to its environment over time?
Correct A. Natural Selection
B. Genetic Drift
C. Gene Flow
D. Mutation

Correct Answer: A

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Question 8
The diagram below shows the structure of a plant cell. What is the function of the cell wall?
Correct A. To provide structural support
B. To regulate the movement of materials
C. To produce energy
D. To synthesize proteins

Correct Answer: A

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Question 9
In the context of excretion, what is the term for the process by which the kidneys filter waste products from the blood?
A. Ureteral Peristalsis
Correct B. Glomerular Filtration
C. Renal Tubular Reabsorption
D. Hemodialysis

Correct Answer: B

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Question 10
The diagram below shows the structure of a mitochondrion. What is the function of the cristae?
A. To increase the surface area for gas exchange
B. To increase the surface area for protein synthesis
Correct C. To increase the surface area for ATP production
D. To increase the surface area for waste removal

Correct Answer: C

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Question 11
In the context of evolutionary theory, what is the primary mechanism by which natural selection acts on genetic variation?
A. Genetic drift
B. Mutation
C. Gene flow
Correct D. Differential reproduction

Correct Answer: D

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Question 12
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 transmission
Correct C. Reduced antibiotic efficacy
D. Enhanced immune response

Correct Answer: C

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Question 13
A diagram of the human circulatory system is shown below. What is the primary function of the pulmonary artery?
Correct A. Oxygenation of blood
B. Deoxygenation of blood
C. Transport of nutrients
D. Removal of waste products

Correct Answer: A

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Question 14
A researcher is studying the effects of climate change on a specific e\cosystem. Which of the following is a likely consequence of increased CO2 levels?
A. Increased plant growth
Correct B. Decreased ocean pH
C. Enhanced nutrient cycling
D. Reduced soil fertility

Correct Answer: B

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Question 15
A diagram of the human skeletal system is shown below. What is the primary function of the sternum?
A. Protection of internal organs
B. Attachment of muscles
C. Support of the spine
Correct D. Facilitation of breathing

Correct Answer: D

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Question 16
In the context of hormonal coordination, what is the primary function of the hypothalamus in regulating the pituitary gland?
Correct A. To produce hormones that stimulate the pituitary gland
B. To inhibit the production of hormones by the pituitary gland
C. To regulate the secretion of hormones by the adrenal glands
D. To stimulate the release of hormones by the thyroid gland

Correct Answer: A

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Question 17
Which of the following types of tissue is characterized by the presence of cilia and microvilli?
Correct A. Epithelial tissue
B. Connective tissue
C. Muscle tissue
D. Nervous tissue

Correct Answer: A

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Question 18
In the context of sense organs, what is the primary function of the retina in the eye?
Correct A. To detect light and transmit signals to the brain
B. To focus light onto the lens
C. To regulate the amount of light entering the eye
D. To produce tears to lubricate the eye

Correct Answer: A

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Question 19
Which of the following microorganisms is responsible for the production of botulism toxin?
A. Bacillus cereus
Correct B. Clostridium botulinum
C. Escherichia coli
D. Staphylococcus aureus

Correct Answer: B

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Question 20
In the context of growth and regulation, what is the primary function of the hypothalamic-pituitary-adrenal axis?
Correct A. To regulate the release of hormones by the adrenal glands
B. To stimulate the production of hormones by the pituitary gland
C. To inhibit the production of hormones by the hypothalamus
D. To regulate the secretion of hormones by the thyroid gland

Correct Answer: A

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Question 21
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 22
The process by which plants convert light energy into chemical energy is known as
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmosis

Correct Answer: A

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Question 23
The genetic material that is responsible for the transmission of traits from one generation to the next is known as
Correct A. DNA
B. RNA
C. Protein
D. Carbohydrate

Correct Answer: A

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Question 24
The process by which the body removes waste products and excess subs\tances is known as
Correct A. Excretion
B. Osmoregulation
C. Respiration
D. Photosynthesis

Correct Answer: A

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Question 25
The sense organ that is responsible for detecting light and color is known as
Correct A. Eye
B. Ear
C. Nose
D. Tongue

Correct Answer: A

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