POST UTME CRAWFORD UNIVERSITY 2025 Biology | Objective

Are you preparing for POST UTME CRAWFORD UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2025 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
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. Production of sugars through photosynthesis
C. Storage of starch and other nutrients
D. Regulation of water potential in the plant

Correct Answer: A

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Question 2
In a eukaryotic cell, what is the primary function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
Correct C. Modification and packaging of proteins and lipids
D. Cell division

Correct Answer: C

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Question 3
In the process of cellular respiration, what is the primary function of the mitochondria?
Correct A. Production of ATP
B. Production of NADH and FADH2
C. Regulation of cell growth
D. Cell signaling

Correct Answer: A

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Question 4
In the process of mitosis, what is the primary function of the spindle fibers?
Correct A. Separation of chromosomes
B. Attachment of chromosomes to the spindle fibers
C. Formation of the nuclear envelope
D. Regulation of cell growth

Correct Answer: A

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Question 5
In the process of meiosis, what is the primary function of the synaptonemal complex?
A. Formation of tetrads
Correct B. Separation of homo\logous chromosomes
C. Formation of the synaptonemal complex
D. Regulation of cell growth

Correct Answer: B

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Question 6
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.36
Correct B. 0.64
C. 0.72
D. 0.88

Correct Answer: B

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Question 7
A 2.5 L flask contains 0.5 M NaCl solution. If 1.0 M HCl is slowly added to the solution, what is the concentration of the resulting solution?
A. 0.25 M
B. 0.5 M
Correct C. 0.75 M
D. 1.0 M

Correct Answer: C

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Question 8
A certain species of bacteria has a generation time of 2 hours. If the initial population is 10^6 cells, what is the population after 5 generations?
A. 10^6
B. 10^7
Correct C. 3.2 \times 10^7
D. 6.4 \times 10^7

Correct Answer: C

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Question 9
A 50 kg person is s\tanding on a scale in an elevator. If the elevator accelerates upward at 2 m/s^2, what is the reading on the scale?
A. 400 N
B. 500 N
Correct C. 550 N
D. 600 N

Correct Answer: C

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Question 10
A certain species of plant has a photosynthetic rate of 10^\( -5 \) mol CO2/s. If the plant is exposed to light for 8 hours, what is the total amount of CO2 fixed?
A. 10^\( -4 \) mol
B. 10^\( -3 \) mol
Correct C. 6.4 \times 10^\( -3 \) mol
D. 6.4 \times 10^\( -2 \) mol

Correct Answer: C

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Question 11
In the context of classification of living things, what is the primary function of the kingdom level?
Correct A. To group organisms based on their cell structure
B. To categorize organisms based on their genetic makeup
C. To classify organisms based on their body structure
D. To group organisms based on their habitat

Correct Answer: A

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Question 12
In the process of excretion and osmoregulation, what is the primary function of the kidneys?
A. To regulate the amount of water in the body
Correct B. To remove waste products from the blood
C. To maintain the balance of electrolytes in the body
D. To regulate the pH level of the blood

Correct Answer: B

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Question 13
In the context of coordination, what is the primary function of the nervous system?
A. To regulate the body's internal environment
Correct B. To transmit signals from the brain to the rest of the body
C. To control the body's voluntary movements
D. To regulate the body's involuntary movements

Correct Answer: B

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Question 14
In the context of respiration and gas exchange, what is the primary function of the alveoli?
Correct A. To exchange oxygen and carbon dioxide between the lungs and the bloodstream
B. To regulate the body's temperature
C. To remove waste products from the blood
D. To regulate the body's pH level

Correct Answer: A

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Question 15
In the context of transport systems, what is the primary function of the xylem?
Correct A. To transport water and minerals from the roots to the leaves
B. To transport oxygen and carbon dioxide between the lungs and the bloodstream
C. To regulate the body's temperature
D. To remove waste products from the blood

Correct Answer: A

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Question 16
The Hardy-Weinberg principle states that a population will remain in genetic equilibrium if five conditions are met. Which of the following is NOT one of these conditions?
A. No mutation occurs
B. No genetic drift occurs
C. No gene flow occurs
Correct D. The population is infinite

Correct Answer: D

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Question 17
A diagram of the respiratory system is shown below. Which of the following structures is responsible for the exchange of oxygen and carbon dioxide?
Correct A. A
B. B
C. C
D. D

Correct Answer: A

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Question 18
In asexual reproduction, which of the following is an example of a type of asexual reproduction?
A. Binary fission
B. Mitosis
C. Meiosis
Correct D. Budding

Correct Answer: D

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Question 19
The classification of living things is based on which of the following characteristics?
A. Cell structure
B. Metabolism
C. Genetic information
Correct D. All of the above

Correct Answer: D

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Question 20
A diagram of a plant cell is shown below. Which of the following structures is responsible for photosynthesis?
Correct A. A
B. B
C. C
D. D

Correct Answer: A

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Question 21
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' for red eyes is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'R'?
Correct A. 0.8
B. 0.6
C. 0.4
D. 0.2

Correct Answer: A

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Question 22
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
Correct A. 0.5
B. 0.25
C. 0.75
D. 0.33

Correct Answer: A

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Question 23
A species of bird has a beak length of 5 cm. If the beak length is normally distributed with a mean of 6 cm and a s\tandard deviation of 1 cm, what is the probability that a randomly selected bird will have a beak length greater than 7 cm?
Correct A. 0.1587
B. 0.3413
C. 0.4772
D. 0.6179

Correct Answer: A

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Question 24
A population of bacteria is growing exponentially with a growth rate of 0.2 per hour. If the initial population is 1000, what is the population after 5 hours?
Correct A. 10000
B. 5000
C. 2000
D. 1000

Correct Answer: A

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Question 25
A plant with the genotype 'RR' is crossed with a plant with the genotype 'Rr'. What is the probability that the offspring will have the genotype 'rr'?
A. 0.5
Correct B. 0.25
C. 0.75
D. 0.33

Correct Answer: B

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