POST UTME UNIBEN 2018 Biology | Objective

Are you preparing for POST UTME UNIBEN exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2018 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a population of 1000 individuals, 70% exhibit the dominant allele for brown eye color. If 20% of the population is heterozygous, what is the frequency of the recessive allele?
Correct A. 0.15
B. 0.20
C. 0.25
D. 0.30

Correct Answer: A

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Question 2
A researcher isolates a microorganism that exhibits the following characteristics: gram-positive, catalase-negative, and motile by \endospores. What is the most likely genus of this microorganism?
Correct A. Bacillus
B. Clostridium
C. Staphylococcus
D. Escherichia

Correct Answer: A

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Question 3
A plant with the genotype RrSs is crossed with a plant with the genotype rrSS. What is the probability that the offspring will exhibit the R allele?
Correct A. 0.50
B. 0.60
C. 0.75
D. 0.90

Correct Answer: A

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Question 4
A diagram of a plant cell is shown below. What is the function of the structure labeled A?
A. Mitochondria
B. Chloroplast
Correct C. Nucleus
D. Vacuole

Correct Answer: C

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Question 5
A diagram of a circuit is shown below. What is the value of the current flowing through the circuit?
A. 2A
Correct B. 3A
C. 4A
D. 5A

Correct Answer: B

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Question 6
In the process of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
Correct B. To generate ATP through oxidative phosphorylation
C. To reduce NADH and FADH2
D. To produce water and carbon dioxide

Correct Answer: B

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Question 7
Which of the following is a characteristic of the sense organ responsible for detecting sound waves?
A. It is sensitive to changes in air pressure
Correct B. It is sensitive to vibrations in the air
C. It is sensitive to changes in temperature
D. It is sensitive to changes in humidity

Correct Answer: B

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Question 8
In the context of genetics, what is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic drift
C. Gene flow
Correct D. Heritability

Correct Answer: D

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Question 9
Which of the following is an example of a tissue that is composed of multiple cell types?
Correct A. Epithelial tissue
B. Connective tissue
C. Muscle tissue
D. Nervous tissue

Correct Answer: A

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Question 10
In the context of classification of living things, what is the term for the process of grouping organisms based on their shared characteristics?
A. Binomial nomenclature
Correct B. Taxonomy
C. Phy\logeny
D. Classification

Correct Answer: B

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Question 11
In the context of the human visual system, what is the primary function of the optic nerve?
Correct A. To transmit visual information from the retina to the brain
B. To regulate the amount of light entering the eye
C. To focus light onto the retina
D. To detect color and movement

Correct Answer: A

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Question 12
Which of the following types of classification is based on the presence or absence of a specific character?
A. Phy\logenetic classification
Correct B. Morpho\logical classification
C. Anatomical classification
D. Genetic classification

Correct Answer: B

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Question 13
What is the term for the process by which an organism's cells become specialized to perform specific functions?
Correct A. Differentiation
B. Mitosis
C. Meiosis
D. Osmosis

Correct Answer: A

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Question 14
In genetics, what is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic drift
C. Natural selection
Correct D. Heritability

Correct Answer: D

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Question 15
Which of the following organs is responsible for the excretion of waste products from the body?
Correct A. Kidneys
B. Liver
C. Lungs
D. Skin

Correct Answer: A

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Question 16
In asexual reproduction, what is the primary mechanism by which genetic variation is introduced?
A. Mutation
B. Gene flow
C. Genetic drift
Correct D. Genetic recombination

Correct Answer: D

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Question 17
What is the primary function of the xylem in plants?
Correct A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Storage of nutrients
D. Regulation of stomatal aperture

Correct Answer: A

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Question 18
What is the process by which a cell divides into two daughter cells of equal size?
Correct A. Mitosis
B. Meiosis
C. Binary fission
D. Endoreduplication

Correct Answer: A

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Question 19
What is the term for the process by which an organism grows and develops from a \single cell?
Correct A. Embryogenesis
B. Organogenesis
C. Tissue formation
D. Cell differentiation

Correct Answer: A

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Question 20
What is the primary function of the blood in animals?
Correct A. Transport of oxygen and nutrients
B. Transport of waste products
C. Regulation of body temperature
D. Storage of energy

Correct Answer: A

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Question 21
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. Mitotic spindle
D. Centrioles

Correct Answer: A

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Question 22
A plant cell is placed in a solution with a high concentration of sucrose. Which of the following will occur?
A. Water will enter the cell by osmosis
Correct B. Water will leave the cell by osmosis
C. The cell will swell and eventually burst
D. The cell will shrink and eventually die

Correct Answer: B

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Question 23
A nerve impulse travels down a neuron through the process of
A. Diffusion
B. Osmosis
C. Active transport
Correct D. Action potential

Correct Answer: D

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Question 24
A plant hormone that promotes cell elongation is
Correct A. Auxin
B. Gibberellin
C. Cytokinin
D. Ethylene

Correct Answer: A

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Question 25
A diagram of a plant cell is shown below. Which of the following structures is responsible for photosynthesis?
A. Mitochondria
Correct B. Chloroplast
C. Endoplasmic reticulum
D. Golgi apparatus

Correct Answer: B

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