POST UTME UNIPORT 2022 Biology | Objective

Are you preparing for POST UTME UNIPORT 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.

Practice these randomly selected questions to test your readiness.

Question 1
The diagram below represents a cross-section of the human eye. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 2
In a population of 1000 individuals, 70% are heterozygous for a particular gene. If 20% of the population are homozygous dominant, what is the frequency of the recessive allele?
Correct A. 0.05
B. 0.10
C. 0.15
D. 0.20

Correct Answer: A

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Question 3
A plant grows in a controlled environment with a cons\tant temperature of 25°C and a photoperiod of 12 hours light and 12 hours dark. What is the expected growth pattern of the plant?
A. Continuous growth
Correct B. Growth during light period only
C. Growth during dark period only
D. No growth

Correct Answer: B

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Question 4
A species of bacteria has a generation time of 2 hours. If the initial population is 1000 cells, what is the population size after 6 hours?
A. 4000
B. 6000
C. 8000
Correct D. 10000

Correct Answer: D

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Question 5
A genetic cross between two individuals results in a 1:1 ratio of offspring with a particular trait. What is the genotype of the parents?
A. Both parents are homozygous dominant
B. Both parents are homozygous recessive
C. One parent is homozygous dominant and the other is homozygous recessive
Correct D. Both parents are heterozygous

Correct Answer: D

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Question 6
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 7
A patient presents with symptoms of tuberculosis. Sputum smear examination reveals the presence of acid-fast bacilli. Which of the following is the most likely cause of the patient's symptoms?
Correct A. Mycobacterium tuberculosis
B. Mycobacterium bovis
C. Mycobacterium avium
D. Mycobacterium leprae

Correct Answer: A

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Question 8
A species of plant has a reproductive strategy that involves producing large numbers of seeds. Which of the following is a likely consequence of this reproductive strategy?
A. Increased genetic variation
Correct B. Decreased genetic variation
C. Increased seed dispersal
D. Decreased seed dispersal

Correct Answer: B

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Question 9
A patient presents with symptoms of kidney disease. Laboratory tests reveal elevated levels of urea and creatinine in the blood. Which of the following is the most likely cause of the patient's symptoms?
Correct A. Chronic kidney disease
B. Acute kidney injury
C. Nephrotic syndrome
D. Nephritic syndrome

Correct Answer: A

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Question 10
A species of animal has a respiratory system that involves the exchange of gases between the air and the blood. Which of the following is a likely consequence of this respiratory system?
Correct A. Increased oxygen levels in the blood
B. Decreased oxygen levels in the blood
C. Increased carbon dioxide levels in the blood
D. Decreased carbon dioxide levels in the blood

Correct Answer: A

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Question 11
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. 0.36
B. 0.64
C. 0.72
D. 0.84

Correct Answer: A

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Question 12
A 50-year-old male patient presents with symptoms of chronic obstructive pulmonary disease (COPD). His arterial blood gas (ABG) shows a pH of 7.35, PCO2 of 40 mmHg, and PO2 of 70 mmHg. What is the primary mechanism of gas exchange in the lungs?
Correct A. Diffusion of oxygen from alveoli to blood
B. Diffusion of carbon dioxide from blood to alveoli
C. Active transport of oxygen from alveoli to blood
D. Active transport of carbon dioxide from blood to alveoli

Correct Answer: A

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Question 13
In a tropical rainforest e\cosystem, the primary producers are mostly plants and algae. What is the role of these organisms in the e\cosystem?
A. Primary consumers
B. Decomposers
Correct C. Producers
D. Omnivores

Correct Answer: C

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Question 14
A 30-year-old female patient presents with symptoms of hypothyroidism. Her thyroid-stimulating hormone (TSH) level is elevated, and her free thyroxine (FT4) level is decreased. What is the primary function of the thyroid gland?
A. To regulate body temperature
Correct B. To regulate metabolism
C. To regulate growth and development
D. To regulate electrolyte balance

Correct Answer: B

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Question 15
In a human body, the nervous system consists of the central nervous system (CNS) and the peripheral nervous system (PNS). What is the primary function of the CNS?
A. To transmit sensory information to the brain
B. To regulate voluntary movements
C. To control involuntary movements
Correct D. To coordinate the functions of the body

Correct Answer: D

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Question 16
The process of natural selection can lead to the evolution of new species through the mechanism of genetic drift, mutation, and gene flow. Which of the following is NOT a mechanism of evolution?
A. Genetic drift
B. Mutation
C. Gene flow
Correct D. Artificial selection

Correct Answer: D

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Question 17
In the context of respiration, what is the primary function of the mitochondria?
Correct A. To produce ATP
B. To break down glu\cose
C. To synthesize proteins
D. To transport oxygen

Correct Answer: A

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Question 18
The xylem is responsible for transporting water and minerals from the roots to the leaves of a plant. What is the primary function of the xylem?
A. To transport sugars and amino acids
Correct B. To transport water and minerals
C. To synthesize chlorophyll
D. To break down cellulose

Correct Answer: B

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Question 19
The process of photosynthesis occurs in the chloroplasts of plant cells. What is the primary function of the chloroplasts?
A. To synthesize chlorophyll
B. To break down glu\cose
Correct C. To produce ATP
D. To transport water and minerals

Correct Answer: C

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Question 20
The process of digestion occurs in the gastrointestinal tract. What is the primary function of the small intestine?
A. To break down proteins
B. To break down carbohydrates
C. To break down fats
Correct D. To absorb nutrients

Correct Answer: D

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Question 21
In a tropical rainforest, the primary consumers are primarily herbivores. Which of the following is a characteristic of these herbivores?
A. They have a large body size
Correct B. They have a short digestive tract
C. They have a specialized digestive system
D. They have a high metabolic rate

Correct Answer: B

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Question 22
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following is a byproduct of this process?
A. Water
B. Carbon dioxide
C. Oxygen
Correct D. All of the above

Correct Answer: D

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Question 23
In a population of rabbits, the birth rate is 0.05 and the death rate is 0.02. What is the net reproductive rate?
Correct A. 0.03
B. 0.05
C. 0.07
D. 0.09

Correct Answer: A

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Question 24
The Hardy-Weinberg principle states that the frequency of alleles in a population remains cons\tant from generation to generation. Which of the following is a condition for this principle to hold?
A. No mutation occurs
B. No gene flow occurs
C. No genetic drift occurs
Correct D. All of the above

Correct Answer: D

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Question 25
The process of mitosis involves the replication of DNA and the separation of chromosomes. Which of the following is a stage of mitosis?
Correct A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: A

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