POST UTME CHRISTOPHER UNIVERSITY 2019 Biology | Objective

Are you preparing for POST UTME CHRISTOPHER UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2019 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
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 2
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
A. To transport water and minerals
Correct B. To store food and water
C. To provide structural support
D. To regulate water potential

Correct Answer: B

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Question 3
In the process of excretion, what is the primary mechanism by which waste products are removed from the body?
A. Diffusion
B. Osmosis
Correct C. Active transport
D. Passive transport

Correct Answer: C

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Question 4
In the cell cycle, what is the primary function of the G1 phase?
A. To synthesize DNA
B. To replicate DNA
Correct C. To prepare for cell division
D. To repair DNA damage

Correct Answer: C

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Question 5
In the tissue system, what is the primary function of the vascular tissue?
A. To provide structural support
B. To store food and water
Correct C. To transport water and minerals
D. To regulate water potential

Correct Answer: C

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Question 6
In the context of osmoregulation, what is the primary function of the hypothalamus in regulating water balance in the body?
A. To maintain a stable blood pressure
B. To regulate the amount of water in the body
C. To control the concentration of electrolytes in the blood
Correct D. To stimulate the release of antidiuretic hormone (ADH)

Correct Answer: D

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Question 7
A cell is placed in a hypertonic solution. What will happen to the cell?
Correct A. The cell will swell and eventually burst
B. The cell will shrink and lose water
C. The cell will remain unchanged
D. The cell will die

Correct Answer: A

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Question 8
A diagram of a plant cell is shown below. What is the function of the cell wall?
Correct A. To provide structural support to the cell
B. To regulate the movement of materials in and out of the cell
C. To produce energy for the cell
D. To synthesize proteins

Correct Answer: A

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Question 9
A diagram of a human eye is shown below. What is the function of the lens?
Correct A. To focus light on the retina
B. To regulate the amount of light entering the eye
C. To produce tears
D. To synthesize vitamin A

Correct Answer: A

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Question 10
A diagram of a neuron is shown below. What is the function of the d\endrites?
A. To transmit signals away from the cell body
Correct B. To receive signals from other neurons
C. To produce neurotransmitters
D. To synthesize proteins

Correct Answer: B

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Question 11
The xylem tissue in plants is responsible for transporting water and minerals from the roots to the leaves. Which of the following is a characteristic of xylem tissue?
A. It is composed of dead cells
B. It is composed of living cells
C. It is responsible for transporting sugars from the leaves to the roots
Correct D. It is responsible for transporting water and minerals from the roots to the leaves

Correct Answer: D

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Question 12
The process of osmoregulation in animals involves the regulation of the concentration of solutes in the body fluids. Which of the following is an example of osmoregulation?
Correct A. The process of excretion of excess water from the body
B. The process of absorption of excess water from the body
C. The process of excretion of excess salts from the body
D. The process of absorption of excess salts from the body

Correct Answer: A

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Question 13
The sense organ responsible for detecting changes in light intensity is the?
Correct A. Eye
B. Ear
C. Nose
D. Mouth

Correct Answer: A

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Question 14
The microorganism responsible for cau\sing tuberculosis is?
A. Escherichia coli
B. Staphylococcus aureus
Correct C. Mycobacterium tuberculosis
D. Salmonella typhi

Correct Answer: C

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Question 15
The evolutionary theory that explains the diversity of life on Earth is?
Correct A. Theory of Natural Selection
B. Theory of Evolution by Gradualism
C. Theory of Common Descent
D. Theory of Punctuated Equilibrium

Correct Answer: A

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Question 16
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. What is the probability that a randomly selected individual will be homozygous recessive?
Correct A. 0.04
B. 0.2
C. 0.4
D. 0.6

Correct Answer: A

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Question 17
A 5% solution of glu\cose in water is to be diluted with water to obtain 2 liters of a 1% solution. How many liters of the 5% solution should be used?
Correct A. 0.5
B. 1
C. 1.5
D. 2

Correct Answer: A

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Question 18
A plant grows from a seed in a controlled environment. The plant's growth rate is measured over time and is found to be proportional to the square root of the time elapsed. If the plant's growth rate is 2 cm/h at t = 4 hours, what is the growth rate at t = 16 hours?
A. 1
B. 2
C. 4
Correct D. 8

Correct Answer: D

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Question 19
A certain species of bacteria doubles in population every 2 hours. If there are initially 100 bacteria, how many bacteria will there be after 6 hours?
A. 100
B. 200
C. 400
Correct D. 800

Correct Answer: D

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Question 20
A 10% solution of salt in water is to be diluted with water to obtain 2 liters of a 5% solution. How many liters of the 10% solution should be used?
Correct A. 0.5
B. 1
C. 1.5
D. 2

Correct Answer: A

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Question 21
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous recessive genotype?
Correct A. 0.04
B. 0.16
C. 0.24
D. 0.36

Correct Answer: A

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Question 22
A researcher is studying the effect of pH on the growth of E. coli. The data shows that the growth rate is highest at pH 7 and decreases as the pH deviates from 7. What type of relationship is this?
A. Direct Proportionality
B. Inverse Proportionality
Correct C. Direct Variation
D. Inverse Variation

Correct Answer: C

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Question 23
A diagram shows a plant with a taproot and a stem with nodes and internodes. What is the function of the nodes?
A. To store food and water
B. To support the stem
C. To produce new plants
Correct D. To absorb water and minerals

Correct Answer: D

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Question 24
A diagram shows a simple harmonic motion graph with a period of 2 seconds. What is the frequency of the motion?
A. 1 Hz
Correct B. 2 Hz
C. 3 Hz
D. 4 Hz

Correct Answer: B

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Question 25
A diagram shows a human eye with a lens and a retina. What is the function of the lens?
Correct A. To focus light on the retina
B. To produce tears
C. To absorb light
D. To produce new cells

Correct Answer: A

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