POST UTME EKSU 2024 Biology | Objective

Are you preparing for POST UTME EKSU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2024 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In the context of evolutionary theories, what is the primary mechanism by which natural selection acts on a population?
A. Genetic drift
B. Gene flow
C. Mutation
Correct D. Differential reproduction

Correct Answer: D

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Question 2
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 3
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. Regulation of body temperature
B. Regulation of hunger and thirst
Correct C. Regulation of reproductive hormones
D. Regulation of stress response

Correct Answer: C

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Question 4
A diagram of a cell division process is shown below. What is the stage of the cell cycle where the chromosomes are condensed and aligned at the metaphase plate?
A. Prophase
Correct B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: B

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Question 5
In the context of genetics, what is the primary mechanism by which a gene is expressed?
Correct A. Transcription
B. Translation
C. Mutation
D. Gene regulation

Correct Answer: A

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Question 6
In a photosynthetic pathway, which of the following is the primary function of the enzyme RuBisCO?
Correct A. Fixing CO2 into a 3-carbon molecule
B. Regenerating RuBP from 3-phosphoglycerate
C. Converting 3-phosphoglycerate into glyceraldehyde 3-phosphate
D. Reducing NADP+ to NADPH

Correct Answer: A

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Question 7
A population of Drosophila melanogaster is being studied for its response to selection for increased wing length. Which of the following is a likely consequence of this selection?
A. Increased genetic variation in wing length
Correct B. Decreased genetic variation in wing length
C. No change in genetic variation in wing length
D. Increased genetic variation in body size

Correct Answer: B

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Question 8
A diagram of the human circulatory system is shown below.
A. The heart pumps blood to the lungs
Correct B. The heart pumps blood to the body
C. The heart pumps blood to the liver
D. The heart pumps blood to the kidneys

Correct Answer: B

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Question 9
A diagram of the human respiratory system is shown below.
A. The lungs expand to increase oxygen levels in the blood
B. The trachea divides into the bronchi
C. The bronchi lead to the alveoli
Correct D. The alveoli are responsible for gas exchange

Correct Answer: D

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Question 10
A diagram of the human digestive system is shown below.
A. The mouth is responsible for mechanical digestion
B. The esophagus transports food to the stomach
C. The stomach secretes digestive enzymes
Correct D. The small intestine absorbs nutrients

Correct Answer: D

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Question 11
In a diploid cell, what is the total number of alleles for a \single gene with two alleles?
A. 2
Correct B. 4
C. 6
D. 8

Correct Answer: B

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Question 12
A plant grows in a pot with a mixture of soil and sand. Which of the following is the primary function of the xylem in this plant?
Correct A. Transporting water and minerals from the roots to the leaves
B. Producing sugars through photosynthesis
C. Storing water and nutrients in the leaves
D. Regulating the plant's temperature

Correct Answer: A

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Question 13
A bacterium is placed in a nutrient-rich broth and allowed to grow. After several hours, the broth becomes cloudy. What is the most likely explanation for this observation?
A. The bacteria have died off due to lack of nutrients
Correct B. The bacteria have formed a biofilm on the surface of the broth
C. The bacteria have consumed all the nutrients in the broth
D. The bacteria have been killed by a bacteriophage

Correct Answer: B

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Question 14
A person has a genetic disorder that affects their ability to digest lactose. Which of the following is the most likely explanation for this condition?
A. The person has a mutation in the gene that codes for lactase
Correct B. The person has a deficiency in the enzyme lactase
C. The person has a problem with the small intestine's ability to absorb lactose
D. The person has a food intolerance to lactose

Correct Answer: B

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Question 15
A plant's growth is limited by the availability of a specific nutrient. Which of the following is the most likely explanation for this observation?
A. The plant has a mutation in the gene that codes for the nutrient
B. The plant has a deficiency in the enzyme that absorbs the nutrient
Correct C. The plant's roots are unable to absorb the nutrient from the soil
D. The plant's leaves are unable to use the nutrient for growth

Correct Answer: C

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Question 16
In a population of 1000 individuals, 70% are heterozygous for the gene controlling the flower color, 20% are homozygous dominant, and 10% are homozygous recessive. What is the expected frequency of the recessive allele?
Correct A. 0.15
B. 0.20
C. 0.25
D. 0.30

Correct Answer: A

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Question 17
A 2-year-old child is brought to the pediatrician with a history of frequent ear infections. The child's mother has a history of otosclerosis. What is the most likely cause of the child's condition?
Correct A. Genetic predisposition
B. Environmental factors
C. Infectious agent
D. Allergic reaction

Correct Answer: A

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Question 18
A researcher is studying the effect of light intensity on photosynthesis in a controlled environment. The researcher measures the rate of photosynthesis at different light intensities and plots the data on a graph. What is the expected shape of the graph?
A. Linear
Correct B. Parabolic
C. Exponential
D. Sigmoidal

Correct Answer: B

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Question 19
A 30-year-old woman presents to the emergency department with a severe headache and fever. She has a history of migraines but this episode is different. What is the most likely diagnosis?
A. Migraine
B. Cluster headache
C. Trigeminal neuralgia
Correct D. Subarachnoid hemorrhage

Correct Answer: D

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Question 20
A researcher is studying the effect of temperature on the growth rate of a microorganism. The researcher measures the growth rate at different temperatures and plots the data on a graph. What is the expected shape of the graph?
A. Linear
B. Parabolic
Correct C. Exponential
D. Sigmoidal

Correct Answer: C

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Question 21
In a population of 1000 individuals, 20% are homozygous dominant (BB), 60% are heterozygous (Bb), and 20% are homozygous recessive (bb). If a random sample of 10 individuals is taken, what is the probability that at least 8 of them will be heterozygous?
A. 0.5
Correct B. 0.6
C. 0.7
D. 0.8

Correct Answer: B

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Question 22
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.25 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, what is the maximum speed of the block?
A. 0.5 m/s
B. 1.0 m/s
Correct C. 1.5 m/s
D. 2.0 m/s

Correct Answer: C

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Question 23
A solution of 0.1 M NaOH is added to a solution of 0.1 M HCl. What is the pH of the resulting solution?
A. 1
B. 2
Correct C. 7
D. 14

Correct Answer: C

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Question 24
A 5 kg object is moving in a circular path with a radius of 2 m. If the object has a speed of 4 m/s, what is the centripetal force acting on the object?
A. 10 N
Correct B. 20 N
C. 30 N
D. 40 N

Correct Answer: B

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Question 25
A 10 kg object is moving in a straight line with a velocity of 5 m/s. If the object is acted upon by a force of 20 N, what is the acceleration of the object?
A. 1 m/s^2
B. 2 m/s^2
C. 3 m/s^2
Correct D. 4 m/s^2

Correct Answer: D

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