POST UTME RSU 2020 Biology | Objective

Are you preparing for POST UTME RSU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2020 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 theory, 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 2
A diagram of the human respiratory system is shown below. What is the primary function of the alveoli?
Correct A. Gas exchange
B. Air filtration
C. Humidity regulation
D. Temperature regulation

Correct Answer: A

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Question 3
In the context of cellular bio\logy, what is the primary function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
C. Lipid metabolism
Correct D. Protein modification and transport

Correct Answer: D

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Question 4
A diagram of a plant cell is shown below. What is the primary function of the vacuole?
Correct A. Storage of water and nutrients
B. Cell signaling
C. Protein synthesis
D. Lipid metabolism

Correct Answer: A

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Question 5
In the context of genetics, what is the primary mechanism by which genetic variation is introduced into a population?
Correct A. Mutation
B. Gene flow
C. Genetic drift
D. Natural selection

Correct Answer: A

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Question 6
In a typical nerve impulse, the action potential is generated by the rapid depolarization of the neuron membrane, which is caused by the opening of voltage-gated sodium channels. What is the name of the process by which the sodium channels are inactivated after the action potential has passed?
A. Sodium-potassium pump
Correct B. Sodium channel inactivation
C. Calcium channel activation
D. Potassium channel opening

Correct Answer: B

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Question 7
The process of mitosis is divided into four stages: prophase, metaphase, anaphase, and telophase. Which stage is characterized by the alignment of chromosomes at the metaphase plate?
A. Prophase
Correct B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: B

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Question 8
The xylem tissue in plants is responsible for transporting water and minerals from the roots to the leaves. What is the name of the type of xylem tissue that is found in the roots and stems of plants?
Correct A. Tracheids
B. Vessel elements
C. Xylem parenchyma
D. Fibers

Correct Answer: A

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Question 9
The process of digestion in the small intestine involves the breakdown of carbohydrates, proteins, and fats into their respective monomers. What is the name of the enzyme that breaks down starches into maltose?
Correct A. Amylase
B. Lactase
C. Maltase
D. Sucrase

Correct Answer: A

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Question 10
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. What is the name of the pigment that plays a crucial role in absorbing light energy?
Correct A. Chlorophyll a
B. Chlorophyll b
C. Carotenoids
D. Phycobiliproteins

Correct Answer: A

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Question 11
In the context of evolutionary theory, what is the primary mechanism by which genetic drift acts to reduce genetic variation within a population?
A. Genetic recombination
B. Mutation
C. Gene flow
Correct D. Genetic drift

Correct Answer: D

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Question 12
A plant cell is placed in a solution containing 1M glu\cose. After 30 minutes, the cell's glu\cose concentration is measured to be 0.5M. What is the rate of glu\cose uptake by the cell?
A. 0.1M/min
Correct B. 0.5M/min
C. 1M/min
D. 5M/min

Correct Answer: B

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Question 13
A diagram of a neuron is shown below. What is the function of the structure labeled 'A'?
Correct A. To transmit signals to other neurons
B. To synthesize neurotransmitters
C. To store genetic information
D. To regulate cell growth

Correct Answer: A

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Question 14
A DNA molecule consists of two complementary strands. If one strand has the sequence 5'-ATCG-3', what is the sequence of the complementary strand?
Correct A. 5'-TAGC-3'
B. 5'-TCGA-3'
C. 5'-GCTA-3'
D. 5'-AGCT-3'

Correct Answer: A

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Question 15
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 0.2/h, what is the population size after 2 hours?
A. 200
Correct B. 400
C. 600
D. 800

Correct Answer: B

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Question 16
In a typical terrestrial e\cosystem, which of the following biomes is characterized by a high level of rainfall and a dense network of tree roots?
Correct A. Tropical Rainforest
B. Temperate Rainforest
C. Temperate Deciduous Forest
D. Boreal Forest

Correct Answer: A

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Question 17
A 2.5-liter solution of 0.5 M NaCl is prepared by dissolving 1.25 g of NaCl in water. What is the molarity of the solution after adding 1.0 liter of 1.0 M HCl?
A. 0.6 M
Correct B. 0.8 M
C. 1.0 M
D. 1.2 M

Correct Answer: B

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Question 18
A plant grows in a pot with a mixture of soil and sand. If the plant grows 10 cm in 5 days, and the soil and sand mixture is 50% sand, what is the rate of growth of the plant in cm/day?
A. 2 cm/day
Correct B. 4 cm/day
C. 6 cm/day
D. 8 cm/day

Correct Answer: B

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Question 19
A diagram of a plant cell is shown below. What is the function of the cell wall?
Correct A. Provides structural support
B. Regulates the movement of materials in and out of the cell
C. Produces energy for the cell
D. Stores genetic information

Correct Answer: A

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Question 20
A diagram of a simple circuit is shown below. What is the current flowing through the circuit?
A. 2 A
Correct B. 4 A
C. 6 A
D. 8 A

Correct Answer: B

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Question 21
In a population of 1000 individuals, 200 have the genotype BB, 400 have the genotype Bb, and 400 have the genotype bb. What is the frequency of the B allele?
A. 0.4
Correct B. 0.5
C. 0.6
D. 0.7

Correct Answer: B

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Question 22
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. What is the probability that their next child will be affected by the disorder?
A. 1/4
Correct B. 1/2
C. 3/4
D. 1

Correct Answer: B

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Question 23
A patient is diagnosed with a kidney disease that requires the removal of excess potassium ions from the body. Which of the following organs is primarily responsible for potassium excretion?
A. Liver
Correct B. Kidneys
C. Pancreas
D. Spleen

Correct Answer: B

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Question 24
A researcher is studying the effect of light on plant growth. She uses a spectrophotometer to measure the absorbance of light by a plant sample. What is the unit of measurement for absorbance?
A. W/m²
B. m²/W
Correct C. 1/m
D. m

Correct Answer: C

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Question 25
A diagram of the human eye is shown below. 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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