POST UTME UNILAG 2022 Biology | Objective

Are you preparing for POST UTME UNILAG 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 a tropical rainforest, the canopy layer is characterized by a dense network of tree branches and leaves. Which of the following adaptations would be most beneficial for a plant species growing in this environment?
Correct A. Large, flat leaves for maximum photosynthesis
B. Deep roots to access water deep in the soil
C. Thick, waxy stems to prevent water loss
D. Small, needle-like leaves to reduce transpiration

Correct Answer: A

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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 of this scenario?
A. The population will remain stable due to limited resources
Correct B. The population will increase exponentially due to abundant resources
C. The population will decrease due to genetic drift
D. The population will become extinct due to lack of genetic diversity

Correct Answer: B

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Question 3
In a human body, the xylem tissue is responsible for transporting water and minerals from the roots to the leaves. Which of the following best describes the structure of xylem tissue?
A. A network of thin, branching tubes
B. A series of thick, waxy vessels
Correct C. A bundle of hollow, dead cells
D. A layer of living cells with thick cell walls

Correct Answer: C

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Question 4
A plant grows in a nutrient-poor soil and develops a deep taproot to access water and minerals. Which of the following best describes the type of plant growth regulation?
A. Hormone-mediated regulation
B. Environmental regulation
C. Genetic regulation
Correct D. Nutrient-mediated regulation

Correct Answer: D

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Question 5
In a photosynthetic pathway, the light-dep\endent reactions occur in the thylakoid membranes of the chloroplast. Which of the following best describes the role of the electron transport chain?
Correct A. To generate ATP and NADPH
B. To produce glu\cose from CO2
C. To oxidize water and produce oxygen
D. To reduce CO2 to glu\cose

Correct Answer: A

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Question 6
In the xylem, what is the primary function of the tracheids?
Correct A. Transport of water and minerals from the roots to the leaves
B. Transport of sugars and other organic compounds from the leaves to the rest of the plant
C. Support and structure for the plant
D. Storage of food and water

Correct Answer: A

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Question 7
Which of the following is an example of a tissue in the human body?
A. Nerve cell
B. Muscle cell
C. Epithelial cell
Correct D. Connective tissue

Correct Answer: D

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Question 8
What is the primary function of the mitochondria in a cell?
A. To synthesize proteins
B. To store genetic information
Correct C. To generate energy for the cell
D. To regulate cell growth and division

Correct Answer: C

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Question 9
What is the process by which plants convert light energy into chemical energy?
A. Respiration
Correct B. Photosynthesis
C. Decomposition
D. Fermentation

Correct Answer: B

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Question 10
What is the term for the movement of molecules from an area of high concentration to an area of low concentration?
A. Osmosis
Correct B. Diffusion
C. Active transport
D. Passive transport

Correct Answer: B

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Question 11
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. However, this principle assumes a population size of _______
A. 1000
B. 10000
Correct C. 100000
D. 1000000

Correct Answer: C

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Question 12
The process of osmoregulation in animals involves the regulation of _______
A. water balance
B. ion balance
C. electrolyte balance
Correct D. all of the above

Correct Answer: D

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Question 13
The structure of the human eye includes the cornea, lens, and retina. The cornea is responsible for _______
Correct A. focu\sing light onto the retina
B. absorbing light and converting it into electrical signals
C. regulating the amount of light that enters the eye
D. none of the above

Correct Answer: A

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Question 14
The process of asexual reproduction in bacteria involves the division of the bacterial cell into two daughter cells. This process is known as _______
Correct A. binary fission
B. mitosis
C. meiosis
D. none of the above

Correct Answer: A

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Question 15
The structure of the human kidney includes the nephrons, which are responsible for filtering waste and excess fluids from the blood. The nephrons are made up of the glomerulus, proximal convoluted tubule, and _______
A. distal convoluted tubule
B. loop of Henle
C. collecting duct
Correct D. all of the above

Correct Answer: D

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Question 16
The process of osmoregulation in animals involves the regulation of water and salt balance in the body. Which of the following is a key mechanism involved in osmoregulation in the kidney?
A. Reabsorption of glu\cose and amino acids
B. Secretion of antidiuretic hormone (ADH)
C. Excretion of excess salt and water
Correct D. Reabsorption of water in the collecting duct

Correct Answer: D

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Question 17
The diagram below shows the structure of a mitochondrion. Which of the following is a function of the cristae?
A. Protein synthesis
B. Electron transport
C. Fatty acid synthesis
Correct D. Oxidative phosphorylation

Correct Answer: D

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Question 18
The Hardy-Weinberg principle states that the frequency of alleles in a population remains cons\tant from generation to generation in the absence of certain factors. Which of the following is a factor that can lead to a change in allele frequency?
A. Mutation
B. Genetic drift
C. Gene flow
Correct D. Natural selection

Correct Answer: D

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Question 19
The diagram below shows the structure of a neuron. Which of the following is a function of the d\endrites?
A. Synthesis of neurotransmitters
B. Transmission of nerve impulses
Correct C. Reception of nerve impulses
D. Storage of nerve impulses

Correct Answer: C

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Question 20
The process of mitosis involves the division of a eukaryotic cell into two daughter cells. Which of the following is a stage of mitosis?
A. Prophase
Correct B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: B

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Question 21
In a study on the epidemio\logy of malaria, researchers found that the prevalence of the disease was significantly higher in areas with poor sanitation and inadequate waste management. Which of the following is the most likely explanation for this observation?
Correct A. The presence of s\tanding water in these areas allows the mosquito vector to breed and multiply.
B. The poor sanitation and inadequate waste management lead to the contamination of water sources, making them more susceptible to mosquito breeding.
C. The high population density in these areas makes it easier for the disease to spread.
D. The lack of access to healthcare services in these areas makes it more difficult to diagnose and treat the disease.

Correct Answer: A

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Question 22
A researcher is studying the structure of a protein and wants to determine the secondary structure of a particular region. Which of the following techniques would be most appropriate for this task?
A. X-ray crystal\lography
B. Nuclear magnetic resonance (NMR) spectroscopy
Correct C. Circular dichroism (CD) spectroscopy
D. Infrared (IR) spectroscopy

Correct Answer: C

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Question 23
A patient presents with a severe case of tuberculosis. Which of the following is the most likely cause of the disease?
Correct A. Infection with Mycobacterium tuberculosis
B. Infection with Mycobacterium bovis
C. Infection with Mycobacterium avium
D. Infection with Mycobacterium kansasii

Correct Answer: A

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Question 24
A researcher is studying the effects of climate change on plant growth. Which of the following is a likely consequence of increased CO2 levels in the atmosphere?
Correct A. Increased plant growth and productivity
B. Decreased plant growth and productivity
C. No effect on plant growth and productivity
D. Increased plant growth in some species, but decreased growth in others

Correct Answer: A

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Question 25
A patient presents with a severe case of sepsis. Which of the following is a likely cause of the disease?
A. Infection with a Gram-positive bacterium
Correct B. Infection with a Gram-negative bacterium
C. Infection with a fungus
D. Infection with a virus

Correct Answer: B

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