POST UTME BSU 2024 Biology | Objective

Are you preparing for POST UTME BSU 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 process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Hormonal regulation
B. Mechanical filtration
C. Electrolyte balance
Correct D. Renal tubular reabsorption

Correct Answer: D

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Question 2
What is the primary function of the Golgi apparatus in eukaryotic cells?
A. Protein synthesis
B. Lipid synthesis
C. Cell signaling
Correct D. Protein modification and sorting

Correct Answer: D

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Question 3
In the context of asexual reproduction, what is the primary advantage of budding in yeast?
A. Increased genetic diversity
B. Improved nutrient uptake
C. Enhanced cell growth
Correct D. Reduced energy exp\enditure

Correct Answer: D

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Question 4
What is the primary mechanism by which the human body regulates blood pH?
A. Buffering capacity of hemoglobin
B. Renal compensation
Correct C. Respiratory compensation
D. Hormonal regulation

Correct Answer: C

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Question 5
In the context of genetic variation, what is the primary mechanism by which genetic drift occurs?
A. Mutation
B. Gene flow
C. Genetic recombination
Correct D. Random sampling of alleles

Correct Answer: D

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Question 6
In a eukaryotic cell, the process of photosynthesis occurs in the following organelle:
A. Mitochondria
Correct B. Chloroplast
C. Nucleus
D. Endoplasmic Reticulum

Correct Answer: B

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Question 7
A patient has been diagnosed with a bacterial infection. Which of the following antibiotics would be most effective against this type of infection?
A. Penicillin
B. Tetracycline
C. Ciprofloxacin
Correct D. Vancomycin

Correct Answer: D

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Question 8
A diagram of the xylem and phloem tissues in a plant stem is shown below. What is the primary function of the xylem tissue?
Correct A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Support and storage
D. Protection from pathogens

Correct Answer: A

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Question 9
A diagram of the human digestive system is shown below. What is the primary function of the pancreas?
A. Digestion of proteins
B. Digestion of carbohydrates
Correct C. Production of hormones
D. Absorption of nutrients

Correct Answer: C

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Question 10
A diagram of the human circulatory system is shown below. What is the primary function of the heart?
A. Pumping blood to the lungs
Correct B. Pumping blood to the body
C. Regulation of blood pressure
D. Absorption of nutrients

Correct Answer: B

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Question 11
In the context of evolutionary bio\logy, what is the primary mechanism by which natural selection acts on populations?
A. Genetic drift
B. Gene flow
C. Mutation
Correct D. Selection

Correct Answer: D

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Question 12
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
Correct A. To focus light on the retina
B. To detect light intensity
C. To regulate pupil size
D. To produce tears

Correct Answer: A

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Question 13
In the context of the circulatory system, what is the primary function of the capillaries?
A. To transport oxygenated blood from the heart to the lungs
B. To transport deoxygenated blood from the lungs to the heart
Correct C. To exchange oxygen and carbon dioxide between the blood and tissues
D. To regulate blood pressure

Correct Answer: C

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Question 14
A diagram of the human brain is shown below. What is the function of the part labeled 'B'?
A. To process visual information
B. To regulate body temperature
C. To control movement
Correct D. To produce hormones

Correct Answer: D

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Question 15
In the context of the \endocrine system, what is the primary function of the pancreas?
Correct A. To produce hormones that regulate blood sugar levels
B. To produce hormones that regulate blood pressure
C. To produce hormones that regulate growth and development
D. To produce hormones that regulate metabolism

Correct Answer: A

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Question 16
In a population of 1000 individuals, 70% are heterozygous for the gene controlling the production of the enzyme lactase. If 20% of the population is homozygous recessive for this gene, what is the frequency of the recessive allele?
A. 0.2
Correct B. 0.3
C. 0.4
D. 0.5

Correct Answer: B

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Question 17
A cell is placed in a solution with a pH of 5.5. If the cell membrane has a permeability coefficient of 0.05 cm/s for H+ ions, what is the rate of H+ ion entry into the cell?
A. 10^{-4} cm/s
B. 10^{-3} cm/s
Correct C. 10^{-2} cm/s
D. 10^{-1} cm/s

Correct Answer: C

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Question 18
A plant has a root system with a total surface area of 100 cm^2. If the root hairs have a length of 1 mm, what is the total length of the root hairs?
A. 100 cm
B. 1000 cm
Correct C. 10,000 cm
D. 100,000 cm

Correct Answer: C

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Question 19
A population of 1000 individuals has a mean height of 170 cm. If the s\tandard deviation is 10 cm, what is the probability that a randomly selected individual will have a height greater than 180 cm?
A. 0.1
Correct B. 0.2
C. 0.3
D. 0.4

Correct Answer: B

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Question 20
A cell has a membrane potential of -70 mV. If the resting potential is -60 mV, what is the magnitude of the action potential?
A. 10 mV
B. 20 mV
Correct C. 30 mV
D. 40 mV

Correct Answer: C

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Question 21
A plant has a root system with a total surface area of 100 cm^2. If the root hairs have a length of 1 mm, what is the total length of the root hairs?
A. 100 cm
B. 1000 cm
Correct C. 10,000 cm
D. 100,000 cm

Correct Answer: C

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Question 22
A population of 1000 individuals has a mean height of 170 cm. If the s\tandard deviation is 10 cm, what is the probability that a randomly selected individual will have a height greater than 180 cm?
A. 0.1
Correct B. 0.2
C. 0.3
D. 0.4

Correct Answer: B

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Question 23
A cell has a membrane potential of -70 mV. If the resting potential is -60 mV, what is the magnitude of the action potential?
A. 10 mV
B. 20 mV
Correct C. 30 mV
D. 40 mV

Correct Answer: C

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Question 24
A plant has a root system with a total surface area of 100 cm^2. If the root hairs have a length of 1 mm, what is the total length of the root hairs?
A. 100 cm
B. 1000 cm
C. 10,000 cm
D. 100,000 cm

Correct Answer: VIEW ANSWER

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Question 25
In the context of osmoregulation, what is the primary function of the hypothalamus in regulating water balance in the body?
A. To increase water reabsorption in the kidneys
B. To decrease water reabsorption in the kidneys
Correct C. To stimulate the release of ADH
D. To inhibit the release of ADH

Correct Answer: C

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