POST UTME MADONNA UNIVERSITY 2019 Biology | Objective

Are you preparing for POST UTME MADONNA UNIVERSITY 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 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 homozygous dominant genotype?
Correct A. 0.36
B. 0.64
C. 0.72
D. 0.84

Correct Answer: A

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Question 2
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.25
Correct B. 0.5
C. 0.75
D. 0.9

Correct Answer: B

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Question 3
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
Correct A. Photosynthesis
B. Respiration
C. Cell division
D. Cell signaling

Correct Answer: A

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Question 4
A diagram of a human digestive system is shown below. What is the function of the structure labeled 'B'?
A. Absorption of nutrients
Correct B. Digestion of proteins
C. Production of bile
D. Storage of waste

Correct Answer: B

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Question 5
A diagram of a human nervous system is shown below. What is the function of the structure labeled 'C'?
Correct A. Transmission of nerve impulses
B. Production of neurotransmitters
C. Storage of memories
D. Regulation of body temperature

Correct Answer: A

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Question 6
In a diploid cell, what is the ratio of autosomal chromosomes to sex chromosomes during meiosis?
A. 1:1
Correct B. 2:1
C. 3:1
D. 4:1

Correct Answer: B

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Question 7
A plant has a genotype of BBSS. What is the probability that it will produce a gamete with the genotype SS?
A. 0.25
Correct B. 0.5
C. 0.75
D. 1

Correct Answer: B

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Question 8
In a population of rabbits, the frequency of the dominant allele (B) is 0.6, and the frequency of the recessive allele (b) is 0.4. What is the frequency of the genotype BB?
A. 0.36
Correct B. 0.48
C. 0.56
D. 0.64

Correct Answer: B

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Question 9
A diagram shows a plant with a long stem and narrow leaves. What is the most likely reason for this phenotype?
A. Lack of light
B. High temperature
Correct C. Low water availability
D. Genetic mutation

Correct Answer: C

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Question 10
A diagram shows a human cell with a large nucleus and a small cytoplasm. What is the most likely reason for this morpho\logy?
A. High cell division rate
Correct B. Low cell division rate
C. High metabolic rate
D. Low metabolic rate

Correct Answer: B

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Question 11
In a population of 1000 individuals, 50% are heterozygous for a particular gene, 30% are homozygous dominant, and 20% are homozygous recessive. What is the probability that a randomly selected individual will be homozygous recessive?
Correct A. 0.2
B. 0.3
C. 0.4
D. 0.5

Correct Answer: A

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Question 12
A plant with the genotype Rr is crossed with a plant with the genotype rr. What is the probability that the offspring will have the genotype RR?
A. 0.25
Correct B. 0.5
C. 0.75
D. 1

Correct Answer: B

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Question 13
A diagram shows a plant with the genotype Rr. If the plant is crossed with a plant with the genotype rr, what is the probability that the offspring will have the genotype Rr?
Correct A. 0.5
B. 0.75
C. 0.9
D. 1

Correct Answer: A

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Question 14
A diagram shows a plant with the genotype Rr. If the plant is crossed with a plant with the genotype rr, what is the probability that the offspring will have the genotype rr?
A. 0.25
Correct B. 0.5
C. 0.75
D. 1

Correct Answer: B

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Question 15
A diagram shows a plant with the genotype Rr. If the plant is crossed with a plant with the genotype rr, what is the probability that the offspring will have the genotype Rr?
Correct A. 0.5
B. 0.75
C. 0.9
D. 1

Correct Answer: A

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Question 16
In a population of 1000 individuals, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?
Correct A. 0.8
B. 0.6
C. 0.4
D. 0.2

Correct Answer: A

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Question 17
A neuron is stimulated by a sensory receptor. Which of the following types of receptors is most likely responsible for this stimulation?
Correct A. Mechanoreceptors
B. Thermoreceptors
C. Photoreceptors
D. Chemoreceptors

Correct Answer: A

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Question 18
A gas exchange occurs in the lungs. What is the primary mechanism by which oxygen is transported from the lungs to the body?
Correct A. Diffusion
B. Osmosis
C. Active transport
D. Passive transport

Correct Answer: A

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Question 19
A microorganism is isolated from a patient's blood culture. Which of the following types of microorganisms is most likely responsible for this infection?
Correct A. Bacteria
B. Fungi
C. Viruses
D. Protozoa

Correct Answer: A

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Question 20
A sense organ is responsible for detecting changes in sound waves. Which of the following types of sense organs is most likely responsible for this function?
Correct A. Auditory receptors
B. Visual receptors
C. Tactile receptors
D. Olfactory receptors

Correct Answer: A

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Question 21
The process of osmoregulation in plants involves the movement of water across the plasma membrane through a specific type of transport protein. Which of the following is the primary function of this protein?
A. To maintain a stable concentration of solutes in the cytosol
Correct B. To regulate the amount of water in the plant's tissues
C. To facilitate the uptake of nutrients from the soil
D. To maintain turgor pressure in the plant's cells

Correct Answer: B

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Question 22
In the context of genetics, what is the term for the process by which a gene is turned on or off?
A. Gene expression
Correct B. Gene regulation
C. Gene mutation
D. Gene duplication

Correct Answer: B

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Question 23
The diagram below shows the structure of a plant cell. What is the function of the organelle labeled 'A'?
Correct A. To synthesize proteins
B. To store genetic information
C. To regulate cell growth
D. To transport materials across the cell membrane

Correct Answer: A

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Question 24
In the context of photosynthesis, what is the term for the process by which light energy is converted into chemical energy?
Correct A. Light-dep\endent reactions
B. Light-indep\endent reactions
C. Calvin cycle
D. Electron transport chain

Correct Answer: A

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Question 25
The diagram below shows the structure of a mitochondrion. What is the function of the organelle labeled 'B'?
A. To synthesize proteins
B. To store genetic information
C. To regulate cell growth
Correct D. To transport materials across the cell membrane

Correct Answer: D

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