Exam Body

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Subject

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POST UTME ESUT 2024 Biology | Objective

Are you preparing for POST UTME ESUT 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 typical plant cell, what is the primary function of the mitochondria?

A. Protein synthesis

B. Cell signaling

Correct C. Energy production

D. Cell division

Correct Answer: C

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Question 2

A researcher is studying the effect of pH on the activity of the enzyme lactase. Which of the following statements is true?

A. The enzyme is most active at a pH of 7

B. The enzyme is most active at a pH of 9

Correct C. The enzyme is most active at a pH of 5

D. The enzyme is most active at a pH of 11

Correct Answer: C

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Question 3

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 movement

C. To regulate pupil size

D. To produce tears

Correct Answer: A

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Question 4

A researcher is studying the effect of temperature on the growth of bacteria. Which of the following statements is true?

A. The bacteria grow fastest at a temperature of 20°C

Correct B. The bacteria grow fastest at a temperature of 30°C

C. The bacteria grow fastest at a temperature of 40°C

D. The bacteria grow fastest at a temperature of 50°C

Correct Answer: B

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Question 5

A diagram of the human brain is shown below. What is the function of the part labeled B?

A. To control movement

B. To regulate body temperature

Correct C. To process sensory information

D. To produce hormones

Correct Answer: C

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Question 6

In a tropical rainforest biome, what is the primary mechanism by which plants obtain essential nutrients?

A. Photosynthesis

B. Decomposition

Correct C. Nutrient cycling

D. Soil erosion

Correct Answer: C

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Question 7

A plant hormone that promotes cell elongation and cell division is

Correct A. Auxin

B. Gibberellin

C. Cytokinin

D. Ethylene

Correct Answer: A

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Question 8

The process by which an organism's genetic information is passed from one generation to the next is

A. Mutation

B. Genetic drift

C. Natural selection

Correct D. Heritability

Correct Answer: D

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Question 9

The nervous system of an organism is responsible for

A. Regulating body temperature

B. Controlling movement

Correct C. Proces\sing sensory information

D. Producing hormones

Correct Answer: C

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Question 10

The xylem tissue in a plant is responsible for

Correct A. Transporting water and minerals from the roots to the leaves

B. Producing sugars through photosynthesis

C. Regulating body temperature

D. Controlling movement

Correct Answer: A

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Question 11

In a eukaryotic cell, what is the primary function of the Golgi apparatus?

A. Protein synthesis

B. Cell signaling

C. Lipid synthesis

Correct D. Protein modification

Correct Answer: D

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Question 12

A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?

A. The cell will shrink due to water loss

Correct B. The cell will swell due to water uptake

C. The cell will remain unchanged

D. The cell will die

Correct Answer: B

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Question 13

A diagram of a plant cell is shown below. Identify the part labeled A.

A. Nucleus

B. Mitochondria

Correct C. Chloroplast

D. Vacuole

Correct Answer: C

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Question 14

A patient is diagnosed with a bacterial infection. Which of the following antibiotics is most likely to be effective?

Correct A. Penicillin

B. Erythromycin

C. Ciprofloxacin

D. Vancomycin

Correct Answer: A

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Question 15

A diagram of a human respiratory system is shown below. Identify the part labeled B.

A. Trachea

Correct B. Lungs

C. Diaphragm

D. Bronchi

Correct Answer: B

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Question 16

In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?

A. 0.2

B. 0.4

Correct C. 0.6

D. 0.8

Correct Answer: C

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Question 17

A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'Rr'?

A. 0.25

Correct B. 0.5

C. 0.75

D. 0.9

Correct Answer: B

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Question 18

A cell is placed in a solution with a pH of 5.5. What is the concentration of hydrogen ions in the solution?

A. 10^{-5}

Correct B. 10^{-5.5}

C. 10^{-6}

D. 10^{-7}

Correct Answer: B

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Question 19

A bacterium is placed in a nutrient-rich medium. What is the expected outcome of the experiment?

A. The bacterium will die.

Correct B. The bacterium will grow and multiply.

C. The bacterium will remain stationary.

D. The bacterium will change color.

Correct Answer: B

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Question 20

A plant is crossed with a plant that has a mutation in the 'R' gene. What is the probability that the offspring will have the 'Rr' genotype?

Correct A. 0.25

B. 0.5

C. 0.75

D. 0.9

Correct Answer: A

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Question 21

In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous recessive genotype 'bb'?

Correct A. 0.04

B. 0.16

C. 0.24

D. 0.36

Correct Answer: A

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Question 22

A researcher is studying the effect of light intensity on the growth of radish plants. She measures the growth of the plants in a controlled environment with varying light intensities. The data is as follows: Light Intensity \( μmol/m²/s \) Growth (cm) 100 10 200 15 300 20 400 25 500 30 What is the correlation coefficient (r) between light intensity and growth?

A. 0.9

B. 0.95

C. 0.98

Correct D. 0.99

Correct Answer: D

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Question 23

A diagram of the nervous system is shown below. What is the function of the structure labeled 'A'?

Correct A. To transmit signals from the brain to the spinal cord

B. To transmit signals from the spinal cord to the brain

C. To regulate body temperature

D. To regulate blood pressure

Correct Answer: A

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Question 24

A researcher is studying the effect of pH on the growth of E. coli bacteria. She measures the growth of the bacteria in a controlled environment with varying pH levels. The data is as follows: pH Growth (OD600) 4 0.2 5 0.5 6 1.0 7 2.0 8 4.0 What is the pKa of the buffer system?

A. 4.5

B. 5.5

Correct C. 6.5

D. 7.5

Correct Answer: C

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Question 25

A diagram of the human eye is shown below. What is the function of the structure labeled 'A'?

Correct A. To focus light onto the retina

B. To regulate the amount of light entering the eye

C. To produce tears

D. To regulate body temperature

Correct Answer: A

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