POST UTME ESUT 2017 Biology | Objective

Are you preparing for POST UTME ESUT exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2017 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 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
Correct A. 0.64
B. 0.36
C. 0.16
D. 0.04

Correct Answer: A

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Question 2
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Mitochondria
B. Chloroplast
Correct C. Nucleus
D. Vacuole

Correct Answer: C

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Question 3
In a random sample of 1000 individuals, 200 have the genotype 'Bb'. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'B'?
A. 0.25
Correct B. 0.30
C. 0.35
D. 0.40

Correct Answer: B

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Question 4
A diagram of a human respiratory system is shown below. Identify the part labeled 'B'.
A. Trachea
Correct B. Lungs
C. Diaphragm
D. Bronchi

Correct Answer: B

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Question 5
In a population of Drosophila melanogaster, the frequency of the dominant allele 'A' is 0.8. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous recessive genotype 'aa'?
Correct A. 0.04
B. 0.16
C. 0.36
D. 0.64

Correct Answer: A

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Question 6
In the context of evolutionary theories, 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 7
A diagram of a neuron is shown below. What is the function of the part labeled 'D'?
A. To receive signals from other neurons
Correct B. To transmit signals to other neurons
C. To synthesize neurotransmitters
D. To regulate the strength of synaptic connections

Correct Answer: B

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Question 8
In the context of cell division, what is the primary function of the spindle fibers during mitosis?
Correct A. To separate chromosomes during anaphase
B. To align chromosomes during prophase
C. To regulate the cell cycle
D. To synthesize DNA during interphase

Correct Answer: A

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Question 9
A diagram of the human respiratory system is shown below. What is the primary function of the part labeled 'E'?
A. To regulate the flow of air into the lungs
B. To filter out dust and debris from the air
C. To exchange oxygen and carbon dioxide
Correct D. To regulate the contraction and relaxation of the diaphragm

Correct Answer: D

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Question 10
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. To regulate body temperature
B. To control hunger and thirst
Correct C. To stimulate the release of hormones
D. To regulate the sleep-wake cycle

Correct Answer: C

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Question 11
In a photosynthetic pathway, what is the primary function of the enzyme RuBisCO?
Correct A. Fixing CO2 into a 3-carbon molecule
B. Converting RuBP into a 3-carbon molecule
C. Regenerating RuBP from a 3-carbon molecule
D. Regulating the Calvin cycle

Correct Answer: A

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Question 12
A 25-year-old woman is diagnosed with type 1 diabetes mellitus. Which of the following is a characteristic of her condition?
A. Insulin resis\tance
Correct B. Pancreatic \beta-cell destruction
C. Genetic predisposition
D. Autoimmune response

Correct Answer: B

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Question 13
A 35-year-old man is admitted to the hospital with symptoms of respiratory distress. His chest X-ray shows a large pleural effusion. Which of the following is the most likely cause of his condition?
A. Lung cancer
B. Pneumonia
Correct C. Cardiac failure
D. Tuberculosis

Correct Answer: C

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Question 14
A 28-year-old woman is diagnosed with a rare genetic disorder that affects her nervous system. Which of the following is a characteristic of her condition?
A. Muscle weakness
B. Seizures
C. Cognitive impairment
Correct D. All of the above

Correct Answer: D

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Question 15
A 40-year-old man is diagnosed with a type of cancer that affects his digestive system. Which of the following is a characteristic of his condition?
Correct A. Tumor growth in the colon
B. Tumor growth in the rectum
C. Tumor growth in the small intestine
D. Tumor growth in the stomach

Correct Answer: A

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Question 16
In the context of evolutionary bio\logy, what is the primary mechanism driving the process of speciation?
A. Genetic drift
Correct B. Natural selection
C. Gene flow
D. Mutation

Correct Answer: B

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Question 17
A diagram of the human respiratory system is shown below. Which of the following structures is responsible for the exchange of oxygen and carbon dioxide?
A. Trachea
Correct B. Lungs
C. Diaphragm
D. Bronchi

Correct Answer: B

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Question 18
In the context of transport systems, what is the primary function of the xylem in plants?
Correct A. Transport of water and minerals from roots to leaves
B. Transport of sugars and amino acids from leaves to roots
C. Transport of oxygen and carbon dioxide between leaves and roots
D. Transport of hormones and other signaling molecules throughout the plant

Correct Answer: A

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Question 19
A diagram of the human circulatory system is shown below. Which of the following structures is responsible for the regulation of blood pressure?
Correct A. Heart
B. Arteries
C. Capillaries
D. Veins

Correct Answer: A

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Question 20
In the context of microorganisms and diseases, what is the primary mechanism by which bacteria cause disease?
A. Invasion of host cells
Correct B. Production of toxins
C. Disruption of host immune system
D. Competition with host for nutrients

Correct Answer: B

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Question 21
In the context of excretion and osmoregulation, what is the primary function of the kidneys in maintaining homeostasis?
A. Regulation of blood pH
B. Maintenance of blood pressure
Correct C. Removal of waste products
D. Regulation of electrolyte balance

Correct Answer: C

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Question 22
A diagram of the human eye is shown below. Identify the part labeled A.
Correct A. Cornea
B. Iris
C. Lens
D. Retina

Correct Answer: A

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Question 23
In the classification of living things, what is the primary characteristic that distinguishes prokaryotes from eukaryotes?
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 24
A diagram of the human reproductive system is shown below. Identify the part labeled B.
A. Testis
Correct B. Ovary
C. Uterus
D. Vagina

Correct Answer: B

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Question 25
In the context of excretion and osmoregulation, what is the primary function of the liver in maintaining homeostasis?
A. Regulation of blood pH
B. Maintenance of blood pressure
C. Removal of waste products
Correct D. Regulation of electrolyte balance

Correct Answer: D

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