POST UTME EKSU 2023 Biology | Objective

Are you preparing for POST UTME EKSU 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, the process of mitosis is initiated by the breakdown of the nuclear envelope. Which of the following structures is responsible for this breakdown?
Correct A. Nuclear lamina
B. Nuclear envelope
C. Nuclear pore
D. Mitotic spindle

Correct Answer: A

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Question 2
A plant cell is placed in a solution containing 0.1 M glu\cose. If the cell membrane is permeable to glu\cose, what will happen to the concentration of glu\cose inside the cell?
A. Increase
B. Decrease
Correct C. Remain the same
D. No change

Correct Answer: C

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Question 3
A diagram of a neuron is shown below. If the neuron is stimulated by an action potential, which of the following structures will be affected?
A. Axon
Correct B. D\endrite
C. Cell body
D. Myelin sheath

Correct Answer: B

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Question 4
A diagram of a plant root is shown below. If the plant is placed in a solution containing 0.1 M potassium ions, what will happen to the concentration of potassium ions inside the root cells?
Correct A. Increase
B. Decrease
C. Remain the same
D. No change

Correct Answer: A

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Question 5
A diagram of a human brain is shown below. If the brain is injured, which of the following structures will be affected?
A. Cerebrum
B. Cerebellum
Correct C. Brainstem
D. Spinal cord

Correct Answer: C

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Question 6
In the context of tissue organization, what is the primary function of the basement membrane?
A. To provide structural support to the epithelial cells
Correct B. To facilitate the exchange of nutrients and waste products between the epithelial cells and the underlying connective tissue
C. To act as a barrier against pathogens and toxins
D. To regulate the movement of ions and water across the epithelial cells

Correct Answer: B

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Question 7
A 30-year-old male patient presents with a 2-year history of progressive weakness and fatigue. On examination, he has a tremor, dysarthria, and a wide-based gait. What is the most likely diagnosis?
Correct A. Multiple System Atrophy (MSA)
B. Parkinson's Disease (PD)
C. Progressive Supranuclear Palsy (PSP)
D. Corticobasal Degeneration (CBD)

Correct Answer: A

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Question 8
A 25-year-old female patient presents with a 6-month history of amenorrhea and galactorrhea. She has a history of polycystic ovary syndrome (PCOS). What is the most likely diagnosis?
Correct A. Hyperprolactinemia
B. Thyroid dysfunction
C. Adrenal insufficiency
D. Hypothyroidism

Correct Answer: A

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Question 9
A 35-year-old male patient presents with a 2-year history of progressive shortness of breath and fatigue. On examination, he has a loud S1 and a wide pulse pressure. What is the most likely diagnosis?
Correct A. Aortic regurgitation
B. Mitral regurgitation
C. Tricuspid regurgitation
D. Pulmonary regurgitation

Correct Answer: A

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Question 10
A 40-year-old female patient presents with a 5-year history of progressive memory loss and confusion. On examination, she has a wide-based gait and a t\endency to fall. What is the most likely diagnosis?
Correct A. Alzheimer's Disease (AD)
B. Frontotemporal Dementia (FTD)
C. Vascular Dementia (VaD)
D. Lewy Body Dementia (LBD)

Correct Answer: A

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Question 11
The process by which microorganisms produce antibiotics is called
A. Biosynthesis
B. Fermentation
C. Metabolism
Correct D. Antibiosis

Correct Answer: D

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Question 12
The diagram below shows the structure of a cell membrane. Which of the following is NOT a component of the cell membrane?
A. Phospholipid
B. Protein
C. Cholesterol
Correct D. DNA

Correct Answer: D

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Question 13
The rate of photosynthesis in a plant is affected by
A. Light intensity
B. Temperature
C. Water availability
Correct D. All of the above

Correct Answer: D

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Question 14
The diagram below shows the structure of a neuron. Which of the following is the function of the d\endrites?
A. To transmit signals to other neurons
Correct B. To receive signals from other neurons
C. To transmit signals to muscles or glands
D. To synthesize neurotransmitters

Correct Answer: B

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Question 15
The diagram below shows the structure of a mitochondrion. Which of the following is the function of the cristae?
Correct A. To synthesize ATP
B. To increase the surface area for gas exchange
C. To store genetic material
D. To regulate the pH of the cell

Correct Answer: A

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Question 16
In the process of osmoregulation, what is the primary function of the kidneys in a hypertonic environment?
A. To excrete excess water
Correct B. To reabsorb excess ions
C. To regulate blood pressure
D. To maintain acid-base balance

Correct Answer: B

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Question 17
A genetic disorder is caused by a mutation in a gene that codes for a protein involved in DNA repair. Which type of mutation is most likely responsible for this disorder?
Correct A. Point mutation
B. Frameshift mutation
C. Deletion mutation
D. Insertion mutation

Correct Answer: A

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Question 18
A cell is placed in a hypotonic solution. What will happen to the cell?
A. The cell will shrink
Correct B. The cell will swell
C. The cell will remain unchanged
D. The cell will burst

Correct Answer: B

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Question 19
A population of bacteria is growing exponentially. If the initial population is 100 bacteria and the population doubles every 2 hours, how many bacteria will there be after 6 hours?
A. 1000
B. 4000
Correct C. 16000
D. 64000

Correct Answer: C

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Question 20
A diagram of a plant cell is shown below. What is the function of the cell wall?
Correct A. To provide structural support
B. To regulate water balance
C. To facilitate gas exchange
D. To synthesize proteins

Correct Answer: A

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Question 21
In the context 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 as byproducts of glycolysis
Correct C. To pump protons across the mitochondrial membrane, creating a proton gradient
D. To reduce oxygen to water

Correct Answer: C

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Question 22
A diagram of the human brain is shown below. Identify the part labeled A.
Correct A. Cerebrum
B. Cerebellum
C. Brainstem
D. Frontal lobe

Correct Answer: A

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Question 23
In the context of hormonal coordination, what is the primary function of insulin?
Correct A. To regulate blood glu\cose levels by promoting glu\cose uptake in cells
B. To stimulate the breakdown of glycogen to glu\cose
C. To inhibit the release of glucagon
D. To stimulate the release of growth hormone

Correct Answer: A

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Question 24
A diagram of the human eye is shown below. Identify the part labeled B.
A. Cornea
Correct B. Iris
C. Lens
D. Retina

Correct Answer: B

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Question 25
In the context of cellular structure, what is the primary function of the \endoplasmic reticulum?
Correct A. To synthesize proteins and lipids
B. To regulate the transport of materials between the nucleus and the cytoplasm
C. To store genetic information
D. To break down cellular waste

Correct Answer: A

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