POST UTME ELIZADE UNIVERSITY 2023 Biology | Objective

Are you preparing for POST UTME ELIZADE 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
The process of osmoregulation in plants involves the movement of water and ions across the plasma membrane. Which of the following statements is correct regarding the role of aquaporins in this process?
A. Aquaporins facilitate the movement of ions across the plasma membrane.
Correct B. Aquaporins are responsible for the movement of water across the plasma membrane.
C. Aquaporins play a crucial role in the regulation of stomatal aperture.
D. Aquaporins are involved in the transport of nutrients across the plasma membrane.

Correct Answer: B

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Question 2
In the context of evolutionary theory, what is the primary mechanism driving the adaptation of populations to changing environments?
Correct A. Natural selection acting on genetic variation.
B. Genetic drift resulting from random events.
C. Gene flow from neighboring populations.
D. Mutation as a source of new genetic variation.

Correct Answer: A

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Question 3
The diagram below represents a cross-section of a plant root. Identify the structure labeled 'A' and describe its function.
Correct A. The root hair cells are responsible for absorbing water and minerals from the soil.
B. The xylem is responsible for transporting water and minerals from the roots to the leaves.
C. The phloem is responsible for transporting sugars and other organic compounds produced by photosynthesis.
D. The root cap protects the root tip from mechanical damage.

Correct Answer: A

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Question 4
The equation for the rate of gas exchange in plants is given by the following formula:
Correct A. The rate of gas exchange is directly proportional to the difference in concentration between the surrounding air and the intercellular spaces.
B. The rate of gas exchange is inversely proportional to the concentration of CO2 in the surrounding air.
C. The rate of gas exchange is directly proportional to the temperature of the surrounding air.
D. The rate of gas exchange is inversely proportional to the humidity of the surrounding air.

Correct Answer: A

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Question 5
The diagram below represents a cross-section of a human heart. Identify the structure labeled 'A' and describe its function.
Correct A. The atrium is responsible for receiving blood from the veins and pumping it into the ventricles.
B. The ventricle is responsible for pumping blood from the heart to the rest of the body.
C. The valve is responsible for preventing backflow of blood from the ventricles to the atria.
D. The heart is responsible for regulating body temperature.

Correct Answer: A

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Question 6
In asexual reproduction, what is the primary mechanism by which genetic variation is introduced?
A. Mutation
B. Genetic drift
C. Gene flow
Correct D. Genetic recombination

Correct Answer: D

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Question 7
In the process of osmoregulation, what is the primary function of the kidneys?
A. To regulate blood pressure
B. To filter waste products from the blood
Correct C. To regulate electrolyte balance
D. To regulate pH levels

Correct Answer: C

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Question 8
In the e\cosystem of a coral reef, what is the primary role of the coral polyps?
A. To provide shelter for fish
B. To produce oxygen through photosynthesis
Correct C. To form the framework of the reef
D. To filter food particles from the water

Correct Answer: C

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Question 9
In the process of mitosis, what is the primary function of the anaphase stage?
A. To condense the chromosomes
Correct B. To separate the sister chromatids
C. To form the spindle fibers
D. To align the chromosomes at the metaphase plate

Correct Answer: B

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Question 10
In the classification of living organisms, what is the primary function of the kingdom level?
A. To group organisms based on their cell structure
B. To group organisms based on their body structure
C. To group organisms based on their metabolic processes
Correct D. To group organisms based on their evolutionary relationships

Correct Answer: D

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Question 11
In the process of osmoregulation, 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. Water reabsorption
D. Ion exchange

Correct Answer: C

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Question 12
What is the primary function of the Golgi apparatus in eukaryotic cells?
A. Protein synthesis
B. Cell signaling
C. Lipid modification
Correct D. Protein transport

Correct Answer: D

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Question 13
In the context of cellular respiration, what is the net ATP yield from the complete breakdown of one glu\cose molecule?
Correct A. 36-38 ATP
B. 32-34 ATP
C. 28-30 ATP
D. 24-26 ATP

Correct Answer: A

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Question 14
What is the primary mechanism by which the pancreas regulates blood glu\cose levels?
Correct A. Insulin secretion
B. Glucagon secretion
C. Gastric emptying
D. Hormonal regulation

Correct Answer: A

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Question 15
In the context of plant nutrition, what is the primary function of the root hairs?
A. Water absorption
Correct B. Nutrient uptake
C. Support structure
D. Storage organ

Correct Answer: B

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Question 16
In a typical human kidney, what is the primary function of the loop of Henle?
Correct A. To reabsorb water and ions
B. To secrete potassium ions
C. To regulate blood pressure
D. To filter waste products

Correct Answer: A

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Question 17
What is the term for the process by which plants convert light energy into chemical energy?
A. Respiration
Correct B. Photosynthesis
C. Transpiration
D. Translocation

Correct Answer: B

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Question 18
In the human eye, what is the primary function of the retina?
A. To focus light on the lens
Correct B. To detect light and transmit signals to the brain
C. To regulate pupil size
D. To produce tears

Correct Answer: B

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Question 19
What is the term for the process by which cells divide and produce two daughter cells?
Correct A. Mitosis
B. Meiosis
C. Binary fission
D. Endoreduplication

Correct Answer: A

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Question 20
In the human digestive system, what is the primary function of the pancreas?
Correct A. To secrete digestive enzymes
B. To regulate blood sugar levels
C. To produce bile
D. To absorb nutrients

Correct Answer: A

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Question 21
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells, each with the same number and kind of chromosomes as the parent cell, is called
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Endoreduplication

Correct Answer: A

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Question 22
The process by which water is transported from the roots to the leaves of a plant is called
Correct A. Transpiration
B. Photosynthesis
C. Respiration
D. Osmosis

Correct Answer: A

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Question 23
The theory of evolution by natural selection was first proposed by
Correct A. Charles Darwin
B. Gregor M\endel
C. Jean-Baptiste Lamarck
D. Alfred Russel Wallace

Correct Answer: A

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Question 24
The process by which an organism's genetic information is passed from one generation to the next is called
A. Heritability
Correct B. Inheri\tance
C. Mutation
D. Genetic Drift

Correct Answer: B

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Question 25
The type of genetic variation that occurs when a new mutation arises in a population is called
A. Genetic Drift
Correct B. Mutation
C. Gene Flow
D. Natural Selection

Correct Answer: B

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