POST UTME REDEEMERS UNIVERSITY 2024 Biology | Objective

Are you preparing for POST UTME REDEEMERS UNIVERSITY 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 a desert e\cosystem, what is the primary mechanism by which plants regulate water loss through their leaves?
Correct A. Stomatal closure
B. Cuticular transpiration
C. Transpiration pull
D. Root pressure

Correct Answer: A

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Question 2
A 2.5-liter solution of 0.5 M NaCl is diluted by adding 1 liter of water. What is the new concentration of NaCl?
A. 0.3 M
Correct B. 0.4 M
C. 0.5 M
D. 0.6 M

Correct Answer: B

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Question 3
A diagram of a plant cell is shown below. Identify the part labeled A.
Correct A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole

Correct Answer: A

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Question 4
A 50-gram sample of a subs\tance is found to have a mass of 25 grams after being placed in a 100-gram container. What is the density of the subs\tance?
A. 0.5 g/cm^3
Correct B. 1.0 g/cm^3
C. 1.5 g/cm^3
D. 2.0 g/cm^3

Correct Answer: B

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Question 5
A diagram of a simple harmonic motion is shown below. Identify the part labeled A.
Correct A. Spring
B. Mass
C. Damping
D. Energy

Correct Answer: A

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Question 6
In the context of cell division, what is the primary function of the centrioles during the prophase stage of mitosis?
Correct A. To form the spindle fibers
B. To replicate the DNA
C. To condense the chromatin
D. To form the nuclear envelope

Correct Answer: A

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Question 7
A species of plant has a chromosome number of 2n = 16. If it is a diploid organism, what is the number of chromosomes in its gametes?
Correct A. 8
B. 16
C. 32
D. 64

Correct Answer: A

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Question 8
A diagram of a plant cell is shown below. Identify the structure labeled 'A'.
Correct A. Cell wall
B. Chloroplast
C. Vacuole
D. Mitochondria

Correct Answer: A

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Question 9
A diagram of a human eye is shown below. Identify the structure labeled 'B'.
A. Cornea
Correct B. Iris
C. Lens
D. Retina

Correct Answer: B

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Question 10
A diagram of a human kidney is shown below. Identify the structure labeled 'C'.
A. Nephron
B. Glomerulus
Correct C. Renal pelvis
D. Ureter

Correct Answer: C

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Question 11
In a population of 1000 individuals, 70% have the dominant allele for brown eye color (B) and 30% have the recessive allele (b). If two individuals with brown eye color are randomly selected for a genetic study, what is the probability that they are both homozygous dominant (BB)?
Correct A. 0.49
B. 0.51
C. 0.69
D. 0.79

Correct Answer: A

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Question 12
A researcher is studying the effect of pH on the growth of E. coli bacteria. The researcher measures the growth rate of the bacteria at different pH levels and plots the data on a graph. Which of the following statements about the graph is most likely true?
A. The graph will show a linear relationship between pH and growth rate.
B. The graph will show a quadratic relationship between pH and growth rate.
Correct C. The graph will show an exponential relationship between pH and growth rate.
D. The graph will show a \logarithmic relationship between pH and growth rate.

Correct Answer: C

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Question 13
A 2-year-old child is diagnosed with a rare genetic disorder that affects the production of a specific enzyme. The child's parents are both carriers of the mutated gene, but they do not have the disorder themselves. What is the probability that their next child will inherit the disorder?
A. 25%
Correct B. 50%
C. 75%
D. 100%

Correct Answer: B

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Question 14
A researcher is studying the effect of temperature on the growth of a specific type of algae. The researcher measures the growth rate of the algae at different temperatures and plots the data on a graph. Which of the following statements about the graph is most likely true?
A. The graph will show a linear relationship between temperature and growth rate.
B. The graph will show a quadratic relationship between temperature and growth rate.
Correct C. The graph will show an exponential relationship between temperature and growth rate.
D. The graph will show a \logarithmic relationship between temperature and growth rate.

Correct Answer: C

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Question 15
A 5-year-old child is diagnosed with a rare genetic disorder that affects the production of a specific enzyme. The child's parents are both carriers of the mutated gene, but they do not have the disorder themselves. What is the probability that their next child will inherit the disorder?
A. 12.5%
Correct B. 25%
C. 37.5%
D. 50%

Correct Answer: B

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Question 16
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 17
A plant cell undergoes photosynthesis in the presence of light. Which of the following is the primary product of the light-dep\endent reactions?
A. ATP
Correct B. NADPH
C. O2
D. H2O

Correct Answer: B

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Question 18
The human nervous system is composed of two main types of neurons: sensory and motor neurons. Which of the following is a characteristic of sensory neurons?
Correct A. They transmit signals from the sensory receptors to the central nervous system
B. They transmit signals from the central nervous system to the muscles and glands
C. They are responsible for the storage and retrieval of information
D. They are involved in the regulation of body temperature

Correct Answer: A

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Question 19
Asexual reproduction in plants can occur through the production of spores. Which of the following is a characteristic of spores?
Correct A. They are produced in large numbers and are dispersed by wind or water
B. They are produced in small numbers and are dispersed by insects
C. They are produced in large numbers and are dispersed by insects
D. They are produced in small numbers and are dispersed by wind or water

Correct Answer: A

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Question 20
The human digestive system is composed of several organs that work together to break down food into nutrients. Which of the following is a characteristic of the small intestine?
Correct A. It is responsible for the absorption of nutrients into the bloodstream
B. It is responsible for the storage of food
C. It is responsible for the digestion of food
D. It is responsible for the elimination of waste

Correct Answer: A

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Question 21
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 22
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. Aorta
B. Pulmonary artery
C. Coronary artery
D. Renal artery

Correct Answer: A

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Question 23
A plant cell is shown below. What is the function of the structure labeled 'X'?
Correct A. Photosynthesis
B. Respiration
C. Storage of nutrients
D. Regulation of cell growth

Correct Answer: A

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Question 24
A diagram of the human eye is shown below. What is the function of the structure labeled 'Y'?
A. Regulation of light entry
Correct B. Focus of light
C. Detection of light
D. Production of tears

Correct Answer: B

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Question 25
A diagram of the human brain is shown below. What is the function of the structure labeled 'Z'?
A. Regulation of body temperature
B. Regulation of hunger
C. Regulation of thirst
Correct D. Regulation of blood pressure

Correct Answer: D

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