POST UTME GREENFIELD UNIVERSITY 2023 Biology | Objective

Are you preparing for POST UTME GREENFIELD UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2023 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a eukaryotic cell, what is the primary function of the \endoplasmic reticulum?
Correct A. Protein synthesis
B. Lipid synthesis
C. Carbohydrate synthesis
D. Cell signaling

Correct Answer: A

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Question 2
What is the process by which plants convert light energy into chemical energy?
A. Respiration
Correct B. Photosynthesis
C. Fermentation
D. Decomposition

Correct Answer: B

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Question 3
In a typical human diet, what is the primary source of energy?
Correct A. Carbohydrates
B. Proteins
C. Fats
D. Fiber

Correct Answer: A

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Question 4
What is the term for the movement of water through a plant, from the roots to the leaves?
A. Transpiration
B. Respiration
C. Photosynthesis
Correct D. Translocation

Correct Answer: D

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Question 5
In a typical human cell, what is the primary function of the mitochondria?
A. Protein synthesis
B. Lipid synthesis
C. Cell signaling
Correct D. Energy production

Correct Answer: D

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Question 6
In a eukaryotic cell, the \endoplasmic reticulum is involved in the synthesis of proteins that are destined for secretion or for use within the cell. Which of the following statements is correct regarding the \endoplasmic reticulum?
A. It is a type of lysosome.
B. It is a type of mitochondrion.
C. It is involved in the synthesis of proteins that are destined for use within the cell.
Correct D. It is involved in the synthesis of proteins that are destined for secretion.

Correct Answer: D

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Question 7
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 burst due to osmotic pressure.

Correct Answer: B

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Question 8
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
Question 9
In a tropical rainforest, the xylem tissue in the vascular bundle of a plant is responsible for transporting water and minerals from the roots to the leaves. What is the primary mechanism by which xylem tissue achieves this transport?
Correct A. Transpiration pull
B. Root pressure
C. Capillary action
D. Osmosis

Correct Answer: A

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Question 10
A population of rabbits in a forest e\cosystem is growing at a rate of 20% per year. If the initial population size is 100 rabbits, what will be the population size after 5 years?
A. 1000
B. 2000
Correct C. 4000
D. 8000

Correct Answer: C

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Question 11
A diagram of the human digestive system is shown below. Which part of the system is responsible for the breakdown of proteins into smaller peptides?
Correct A. Stomach
B. Small intestine
C. Pancreas
D. Liver

Correct Answer: A

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Question 12
A diagram of the water cycle is shown below. Which process is responsible for the evaporation of water from the surface of the ocean?
Correct A. Evaporation
B. Condensation
C. Precipitation
D. Runoff

Correct Answer: A

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Question 13
A diagram of the human eye is shown below. Which part of the eye is responsible for adjusting the amount of light entering the eye?
A. Cornea
Correct B. Iris
C. Lens
D. Retina

Correct Answer: B

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Question 14
A diagram of the human skeletal system is shown below. Which bone is responsible for forming the joint between the arm and the shoulder?
Correct A. Scapula
B. Humerus
C. Clavicle
D. Sternum

Correct Answer: A

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Question 15
A diagram of the human brain is shown below. Which part of the brain is responsible for controlling voluntary movements?
Correct A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal cord

Correct Answer: A

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Question 16
In a tropical rainforest e\cosystem, the primary consumers are primarily herbivores. Which of the following is a characteristic of these herbivores?
A. They have large body size
Correct B. They have specialized digestive systems
C. They have adaptations for speed and agility
D. They have low metabolic rates

Correct Answer: B

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Question 17
The Hardy-Weinberg principle states that a population will remain in a state of genetic equilibrium if certain conditions are met. Which of the following is NOT one of these conditions?
A. Random mating
B. No mutation
C. No gene flow
Correct D. No natural selection

Correct Answer: D

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Question 18
In a typical cell, the mitochondria is responsible for producing energy for the cell through which process?
A. Photosynthesis
Correct B. Respiration
C. Fermentation
D. Glycolysis

Correct Answer: B

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Question 19
The process of genetic drift can lead to the loss of genetic variation in a population. Which of the following is a factor that can contribute to genetic drift?
A. Mutation
B. Gene flow
Correct C. Genetic drift
D. Genetic variation

Correct Answer: C

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Question 20
In a typical e\cosystem, the producers are primarily responsible for which of the following?
A. Decomposition
B. Nutrient cycling
Correct C. Primary production
D. Secondary production

Correct Answer: C

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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. 0.48
B. 0.36
C. 0.64
D. 0.52

Correct Answer: A

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Question 22
A researcher isolates a bacterium that exhibits antibiotic resis\tance. The bacterium's DNA is analyzed, and a point mutation is found in the gene encoding the target protein of the antibiotic. What type of mutation is this?
A. Frameshift mutation
Correct B. Point mutation
C. Deletion
D. Insertion

Correct Answer: B

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Question 23
A diagram of a plant cell is shown below. Identify the organelle labeled 'X'.
A. Mitochondria
B. Chloroplast
C. Vacuole
Correct D. Endoplasmic reticulum

Correct Answer: D

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Question 24
A diagram of a simple circuit is shown below. What is the current flowing through the circuit?
Correct A. 2A
B. 4A
C. 6A
D. 8A

Correct Answer: A

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Question 25
A diagram of a plant's photosynthetic pathway is shown below. What is the byproduct of the light-dep\endent reactions?
Correct A. ATP
B. NADPH
C. Oxygen
D. Glu\cose

Correct Answer: A

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