POST UTME BELLS UNIVERSITY 2022 Biology | Objective

Are you preparing for POST UTME BELLS UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2022 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
Correct C. No gene flow
D. No natural selection

Correct Answer: C

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Question 2
In a photosynthetic plant, the light-dep\endent reactions occur in the thylakoid membranes of the chloroplasts. Which of the following is a product of the light-dep\endent reactions?
A. ATP
Correct B. NADPH
C. RuBP
D. O2

Correct Answer: B

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Question 3
The process of digestion in the small intestine involves the breakdown of proteins into smaller peptides and amino acids. Which of the following enzymes is responsible for this process?
A. Pep\sin
Correct B. Tryp\sin
C. Chymotryp\sin
D. Lactase

Correct Answer: B

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Question 4
The growth of a population is influenced by several factors, including birth rate, death rate, and immigration/emigration. Which of the following is a characteristic of a population with a high birth rate?
A. High population density
B. Low population density
Correct C. High birth rate
D. Low birth rate

Correct Answer: C

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Question 5
The xylem is a type of vascular tissue in plants that is responsible for transporting water and minerals from the roots to the leaves. Which of the following is a characteristic of xylem tissue?
Correct A. Dead cells
B. Living cells
C. Tracheids
D. Vessel elements

Correct Answer: A

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Question 6
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the Hardy-Weinberg principle is applied, what is the frequency of the homozygous dominant genotype?
Correct A. 0.36
B. 0.64
C. 0.16
D. 0.44

Correct Answer: A

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Question 7
A plant cell has a cell wall, a large central vacuole, and a small amount of cytoplasm. Which of the following is NOT a characteristic of this cell?
A. Large central vacuole
B. Small amount of cytoplasm
C. Cell wall
Correct D. Mitochondria

Correct Answer: D

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Question 8
In a study on the effect of pH on enzyme activity, the following data were collected:
A. pH 7
Correct B. pH 9
C. pH 11
D. pH 13

Correct Answer: B

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Question 9
A diagram of the xylem and phloem tissues in a plant stem is shown below:
A. Xylem transports water and minerals
Correct B. Phloem transports sugars and amino acids
C. Both xylem and phloem transport water and minerals
D. Neither xylem nor phloem transport water and minerals

Correct Answer: B

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Question 10
A diagram of the respiratory system is shown below:
A. The trachea is responsible for gas exchange
Correct B. The lungs are responsible for gas exchange
C. Both the trachea and lungs are responsible for gas exchange
D. Neither the trachea nor the lungs are responsible for gas exchange

Correct Answer: B

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Question 11
The hormone responsible for regulating the growth and development of plants is
Correct A. Gibberellin
B. Auxin
C. Cytokinin
D. Ethylene

Correct Answer: A

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Question 12
The process by which plants make their own food from sunlight is called
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmosis

Correct Answer: A

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Question 13
The part of the plant that makes food from sunlight is called
A. Root
B. Stem
Correct C. Leaf
D. Flower

Correct Answer: C

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Question 14
The process by which plants release water vapor into the air is called
Correct A. Transpiration
B. Respiration
C. Photosynthesis
D. Osmosis

Correct Answer: A

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Question 15
The part of the plant that absorbs water and minerals from the soil is called
Correct A. Root
B. Stem
C. Leaf
D. Flower

Correct Answer: A

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Question 16
In the process of osmoregulation, what is the primary mechanism by which the kidney regulates the concentration of ions in the blood?
A. Reabsorption of ions in the proximal convoluted tubule
B. Secretion of ions in the distal convoluted tubule
Correct C. Regulation of ion channels in the collecting duct
D. Excretion of ions in the urine

Correct Answer: C

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Question 17
What is the primary function of the Golgi apparatus in the process of protein synthesis?
Correct A. Modification of proteins to prepare them for transport
B. Synthesis of proteins from amino acids
C. Degradation of proteins
D. Transport of proteins to the cell membrane

Correct Answer: A

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Question 18
In the process of digestion, what is the primary enzyme responsible for breaking down proteins into smaller peptides?
A. Pep\sin
Correct B. Tryp\sin
C. Chymotryp\sin
D. Lactase

Correct Answer: B

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Question 19
What is the primary function of the mitochondria in the process of cellular respiration?
Correct A. Generation of ATP from glu\cose
B. Synthesis of proteins from amino acids
C. Degradation of proteins
D. Transport of proteins to the cell membrane

Correct Answer: A

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Question 20
In the process of osmoregulation, what is the primary mechanism by which the kidney regulates the concentration of water in the blood?
A. Reabsorption of water in the proximal convoluted tubule
B. Secretion of water in the distal convoluted tubule
Correct C. Regulation of aquaporin channels in the collecting duct
D. Excretion of water in the urine

Correct Answer: C

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Question 21
In the context of blood transport systems, what is the primary function of the erythrocytes?
A. To regulate blood pH
Correct B. To transport oxygen and carbon dioxide
C. To maintain blood pressure
D. To filter waste products

Correct Answer: B

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Question 22
According to the Hardy-Weinberg principle, what is the expected frequency of the recessive allele in a population?
Correct A. 0.25
B. 0.5
C. 0.75
D. 1.0

Correct Answer: A

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Question 23
In the context of sexual reproduction, what is the primary function of the sperm cell?
A. To provide genetic material
Correct B. To fertilize the egg cell
C. To regulate hormone levels
D. To maintain blood pressure

Correct Answer: B

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Question 24
According to the nervous system, what is the primary function of the synapse?
Correct A. To transmit nerve impulses
B. To regulate hormone levels
C. To maintain blood pressure
D. To filter waste products

Correct Answer: A

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Question 25
In the context of cell division, what is the primary function of the mitotic spindle?
Correct A. To separate chromosomes
B. To regulate gene expression
C. To maintain cell shape
D. To transport molecules

Correct Answer: A

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