POST UTME RSU 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A researcher is studying the effect of pH on the growth of E. coli. She sets up three identical experiments with different pH levels: 5, 7, and 9. After 24 hours, she measures the growth of the bacteria in each experiment. Which of the following statements is true about the results?
A. The bacteria grew fastest at pH 5.
B. The bacteria grew fastest at pH 7.
C. The bacteria grew fastest at pH 9.
D. The bacteria grew equally well at all three pH levels.
Question 2
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the protein kinase Cdc28. What is the primary function of the Cdc28 protein kinase in this context?
A. To phosphorylate and activate the cyclin-dep\endent kinase
B. To inhibit the activity of the anaphase-promoting complex
C. To regulate the expression of the histone genes
D. To control the entry into the S phase of the cell cycle
Question 3
A diagram of a hormonal system is shown below. What is the function of the structure labeled 'C'?
A. To bind to hormone molecules
B. To synthesize hormones
C. To regulate gene expression
D. To transport hormones across cell membranes
Question 4
A researcher is studying the structure of a protein that is involved in the regulation of gene expression. The protein has a molecular weight of 60 kDa and is composed of 400 amino acids. What is the average molecular weight of each amino acid in the protein?
A. 150 Da
B. 170 Da
C. 190 Da
D. 210 Da
Question 5
A diagram of a nervous system is shown below. What is the function of the structure labeled 'B'?
A. To transmit signals to other nerve cells
B. To synthesize neurotransmitters
C. To regulate muscle contraction
D. To store genetic information
Question 6
A diagram shows a plant with a taproot and a stem with two leaves. The plant is placed in a pot with a mixture of soil and sand. What is the primary function of the taproot in this plant?
A. To absorb water and nutrients from the soil.
B. To support the stem and leaves.
C. To store food for the plant.
D. To protect the plant from pests.
Question 7
A diagram shows a simple e\cosystem with a producer, a consumer, and a decomposer. The producer is a type of algae that grows in the water. The consumer is a small fish that eats the algae. The decomposer is a type of bacteria that breaks down dead plants and animals. What is the role of the decomposer in this e\cosystem?
A. To produce food for the consumer.
B. To break down dead plants and animals.
C. To provide shelter for the consumer.
D. To regulate the population of the consumer.
Question 8
What is the primary function of the nervous system in an organism?
A. To regulate body temperature
B. To control movement
C. To transmit and process information
D. To produce hormones
Question 9
The process by which plants convert light energy into chemical energy is known as
A. Respiration
B. Photosynthesis
C. Transpiration
D. Translocation
Question 10
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. To synthesize proteins
B. To store genetic information
C. To regulate cell growth
D. To transport materials across the cell membrane
Question 11
A cell is placed in a hypertonic solution. What will happen to the cell?
A. The cell will swell and eventually burst
B. The cell will shrink and lose water
C. The cell will remain unchanged
D. The cell will undergo mitosis
Question 12
A patient is diagnosed with a disease caused by a mutation in the TP53 gene. The patient's symptoms include skin lesions, fatigue, and weight loss. Which of the following is the most likely cause of the patient's symptoms?
A. The patient has a viral infection
B. The patient has a bacterial infection
C. The patient has a fungal infection
D. The patient has a genetic disorder
Question 13
A researcher is studying the structure of a protein that is involved in the regulation of gene expression. The protein has a molecular weight of 40 kDa and is composed of 300 amino acids. What is the average molecular weight of each amino acid in the protein?
A. 120 Da
B. 140 Da
C. 160 Da
D. 180 Da
Question 14
A diagram shows a simple food chain with a producer, a consumer, and a decomposer. The producer is a type of grass that grows in the soil. The consumer is a small mouse that eats the grass. The decomposer is a type of bacteria that breaks down dead plants and animals. What is the role of the consumer in this food chain?
A. To produce food for the decomposer.
B. To break down dead plants and animals.
C. To provide shelter for the decomposer.
D. To regulate the population of the decomposer.
Question 15
A cell is in the G2 phase of the cell cycle. Which of the following is a characteristic of this phase?
A. DNA replication occurs
B. Mitosis occurs
C. Growth and preparation for mitosis occur
D. Interphase occurs

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