POST UTME LASU 2022 Biology | Objective

Are you preparing for POST UTME LASU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2022 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In the process of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
B. To produce NADH and FADH2
Correct C. To pump protons across the mitochondrial membrane
D. To reduce oxygen to water

Correct Answer: C

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Question 2
A population of rabbits is introduced to a new island with an abundance of food and no natural predators. Which of the following best describes the expected outcome?
A. The population will remain stable due to limited resources
Correct B. The population will increase exponentially
C. The population will decrease due to genetic drift
D. The population will become extinct due to inbreeding

Correct Answer: B

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Question 3
A diagram of the human circulatory system is shown below. What is the primary function of the pulmonary valve?
Correct A. To regulate blood flow from the heart to the lungs
B. To regulate blood flow from the lungs to the heart
C. To regulate blood pressure in the aorta
D. To regulate blood flow from the heart to the aorta

Correct Answer: A

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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. To store water and nutrients
B. To synthesize proteins
C. To regulate pH levels
D. To produce ATP

Correct Answer: A

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Question 5
A diagram of the human eye is shown below. What is the primary function of the lens?
Correct A. To focus light on the retina
B. To regulate blood flow to the retina
C. To produce tears
D. To regulate pupil size

Correct Answer: A

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Question 6
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells is known as
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Endoreduplication

Correct Answer: A

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Question 7
The process by which plants convert light energy into chemical energy is known as
A. Respiration
Correct B. Photosynthesis
C. Transpiration
D. Translocation

Correct Answer: B

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Question 8
The xylem is responsible for transporting
Correct A. Water and minerals
B. Sugars and amino acids
C. Oxygen and carbon dioxide
D. Waste products

Correct Answer: A

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Question 9
The process by which cells become specialized to perform specific functions is known as
Correct A. Differentiation
B. Mitosis
C. Meiosis
D. Endoreduplication

Correct Answer: A

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Question 10
The gas exchange process that occurs in the lungs is known as
Correct A. Respiration
B. Photosynthesis
C. Transpiration
D. Translocation

Correct Answer: A

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Question 11
In the context of evolutionary theories, what is the primary mechanism by which genetic drift leads to the fixation of a deleterious allele in a population?
A. Mutation
B. Genetic recombination
C. Gene flow
Correct D. Genetic drift

Correct Answer: D

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Question 12
A diagram of a plant's xylem and phloem is shown below. Which of the following is the primary function of the xylem?
Correct A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Support and storage
D. Protection from pathogens

Correct Answer: A

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Question 13
In the context of excretion and osmoregulation, what is the primary function of the kidneys in a human?
A. Regulation of blood pressure
Correct B. Removal of waste products
C. Maintenance of electrolyte balance
D. Regulation of body temperature

Correct Answer: B

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Question 14
A diagram of the human eye is shown below. Which of the following is the primary function of the retina?
A. Detection of light
B. Focu\sing of light
Correct C. Transmission of signals to the brain
D. Production of tears

Correct Answer: C

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Question 15
In the context of evolutionary theories, what is the primary mechanism by which natural selection leads to the adaptation of a population to its environment?
A. Mutation
B. Genetic recombination
C. Gene flow
Correct D. Natural selection

Correct Answer: D

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Question 16
In the process of cellular respiration, what is the primary function of the mitochondria?
A. To synthesize ATP from ADP and Pi
B. To break down glu\cose into pyruvate
C. To produce NADH and FADH2 from the citric acid cycle
Correct D. To transport electrons from NADH and FADH2 to oxygen

Correct Answer: D

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Question 17
What is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Hormonal regulation
B. Electrolyte balance
Correct C. Osmoregulation
D. Renal tubular reabsorption

Correct Answer: C

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Question 18
In the context of hormonal regulation, what is the primary function of the hypothalamus?
A. To regulate body temperature
B. To control hunger and thirst
Correct C. To stimulate the release of hormones
D. To regulate sleep-wake cycles

Correct Answer: C

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Question 19
What is the primary mechanism by which the nervous system regulates the movement of muscles?
Correct A. Electrical impulses
B. Chemical signals
C. Mechanical forces
D. Thermal energy

Correct Answer: A

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Question 20
In the context of asexual reproduction, what is the primary advantage of budding?
A. Increased genetic diversity
Correct B. Reduced energy exp\enditure
C. Improved survival rates
D. Enhanced adaptability

Correct Answer: B

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Question 21
The process of osmoregulation in plants involves the movement of water across the plasma membrane through a specific type of transport protein. Which of the following is the primary function of this protein?
A. Water channel protein
Correct B. Aquaporin
C. Ion channel protein
D. Transporter protein

Correct Answer: B

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Question 22
In the context of cell division, what is the primary role of the centrioles in the formation of the spindle fibers?
Correct A. To provide a site for microtubule assembly
B. To anchor the spindle fibers to the centromere
C. To regulate the movement of chromosomes during anaphase
D. To facilitate the separation of sister chromatids

Correct Answer: A

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Question 23
The diagram below shows a cross-section of a plant root. Identify the structure labeled 'A'?
Correct A. Root hair
B. Epidermal cell
C. Vascular tissue
D. Parenchyma cell

Correct Answer: A

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Question 24
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. Which of the following is the primary reac\tant in this process?
Correct A. Carbon dioxide
B. Water
C. Glu\cose
D. Oxygen

Correct Answer: A

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Question 25
The diagram below shows a simple e\cosystem. Identify the primary producer in this e\cosystem?
Correct A. Plant
B. Animal
C. Decomposer
D. Microorganism

Correct Answer: A

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