POST UTME PAN-ATLANTIC UNIVERSITY 2022 Biology | Objective

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Practice these randomly selected questions to test your readiness.

Question 1
In the context of blood transport systems, what is the primary function of the erythrocyte membrane?
A. To regulate the movement of ions and nutrients across the membrane
B. To maintain the structural integrity of the cell
Correct C. To facilitate the exchange of gases between the blood and tissues
D. To synthesize and store hemoglobin

Correct Answer: C

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Question 2
A researcher is studying the effects of hormonal coordination on plant growth. Which of the following hormones is primarily responsible for promoting cell elongation?
Correct A. Auxin
B. Gibberellin
C. Cytokinin
D. Ethylene

Correct Answer: A

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Question 3
A bio\logist is classifying a newly discovered species of plant. Which of the following characteristics would most likely place it in the kingdom Plantae?
A. Presence of a cell wall
Correct B. Ability to photosynthesize
C. Presence of flagella
D. Ability to move

Correct Answer: B

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Question 4
A diagram of a xylem vessel is shown below. What is the primary function of the vessel?
Correct A. To transport water and minerals from the roots to the leaves
B. To transport sugars and other organic compounds from the leaves to the rest of the plant
C. To store water and nutrients
D. To regulate the movement of ions and nutrients across the membrane

Correct Answer: A

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Question 5
A diagram of a human respiratory system is shown below. What is the primary function of the alveoli?
Correct A. To exchange oxygen and carbon dioxide with the blood
B. To filter the blood
C. To regulate the movement of ions and nutrients across the membrane
D. To store water and nutrients

Correct Answer: A

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Question 6
In a tropical rainforest, the nutrient cycle is primarily driven by the decomposition of organic matter by which of the following organisms?
A. Fungi
Correct B. Bacteria
C. Protozoa
D. Rotifers

Correct Answer: B

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Question 7
The process by which plants convert light energy into chemical energy is known as?
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Evaporation

Correct Answer: A

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Question 8
In the human kidney, the process of filtering waste products from the blood is primarily carried out by the?
Correct A. Nephrons
B. Glomeruli
C. Renal Pelvis
D. Ureter

Correct Answer: A

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Question 9
The cell membrane is selectively permeable due to the presence of?
A. Lipid bilayer
Correct B. Protein channels
C. Carbohydrate molecules
D. Nucleic acids

Correct Answer: B

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Question 10
The process of evolution is driven by?
Correct A. Natural selection
B. Genetic drift
C. Mutation
D. Gene flow

Correct Answer: A

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Question 11
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is 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 12
A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. If 1.0 mol of gas is added to the flask at the same temperature, what is the new pressure?
A. 2.5 atm
Correct B. 3.0 atm
C. 4.0 atm
D. 5.0 atm

Correct Answer: B

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Question 13
A plant with the genotype 'Aa' produces 50% red flowers and 50% white flowers. What is the genotype of the parent plant?
A. AA
Correct B. Aa
C. aa
D. A

Correct Answer: B

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Question 14
A 10 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. If the block is displaced 0.2 m from its equilibrium position and released, what is the maximum speed of the block?
A. 2.0 m/s
Correct B. 4.0 m/s
C. 6.0 m/s
D. 8.0 m/s

Correct Answer: B

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Question 15
A 5.0 L flask contains 2.0 mol of an ideal gas at 37°C. If the gas is compressed to 1.0 L at the same temperature, what is the new pressure?
A. 10 atm
Correct B. 20 atm
C. 30 atm
D. 40 atm

Correct Answer: B

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Question 16
The xylem tissue in plants is responsible for transporting water and minerals from the roots to the leaves. Which of the following is a characteristic of xylem tissue?
A. It is composed of dead cells.
B. It is responsible for transporting sugars from the leaves to the roots.
C. It is composed of living cells.
Correct D. It is responsible for transporting water and minerals from the roots to the leaves.

Correct Answer: D

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Question 17
The sense organ responsible for detecting changes in light intensity is the?
Correct A. Eye
B. Ear
C. Nose
D. Mouth

Correct Answer: A

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Question 18
The process by which an organism grows and develops from a \single cell is called?
Correct A. Mitosis
B. Meiosis
C. Photosynthesis
D. Growth and Development

Correct Answer: A

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Question 19
The classification of living things into kingdoms is based on?
A. Cell structure
B. DNA structure
C. Metabolism
Correct D. Cellular organization

Correct Answer: D

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Question 20
The microorganism responsible for cau\sing tuberculosis is?
A. Bacillus anthracis
Correct B. Mycobacterium tuberculosis
C. Escherichia coli
D. Staphylococcus aureus

Correct Answer: B

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Question 21
The diagram below shows the structure of a plant cell. Which of the following is a characteristic of the cell wall?
Correct A. It is composed of cellulose.
B. It is responsible for maintaining the shape of the cell.
C. It is composed of proteins.
D. It is responsible for transporting subs\tances into and out of the cell.

Correct Answer: A

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Question 22
The sense organ responsible for detecting changes in sound intensity is the?
A. Eye
Correct B. Ear
C. Nose
D. Mouth

Correct Answer: B

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Question 23
The process by which an organism grows and develops from a \single cell is called?
Correct A. Mitosis
B. Meiosis
C. Photosynthesis
D. Growth and Development

Correct Answer: A

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Question 24
The classification of living things into kingdoms is based on?
A. Cell structure
B. DNA structure
C. Metabolism
Correct D. Cellular organization

Correct Answer: D

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Question 25
The microorganism responsible for cau\sing tuberculosis is?
A. Bacillus anthracis
Correct B. Mycobacterium tuberculosis
C. Escherichia coli
D. Staphylococcus aureus

Correct Answer: B

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