POST UTME IMS U 2025 Biology | Objective

Are you preparing for POST UTME IMS U 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
A study on the genetic variation of a population found that the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?
Correct A. 0.8
B. 0.6
C. 0.4
D. 0.2

Correct Answer: A

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Question 2
The nervous system of a vertebrate consists of the central nervous system (CNS) and the peripheral nervous system (PNS). Which of the following is a characteristic of the PNS?
A. It is responsible for transmitting signals to and from the CNS.
B. It is responsible for controlling voluntary movements.
Correct C. It is responsible for regulating the body's autonomic functions.
D. It is responsible for proces\sing sensory information.

Correct Answer: C

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Question 3
The excretory system of a human consists of the kidneys, ureters, bladder, and urethra. Which of the following is a function of the kidneys?
Correct A. To filter waste products from the blood.
B. To regulate the body's pH levels.
C. To produce hormones that control growth and development.
D. To produce red blood cells.

Correct Answer: A

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Question 4
The sense organ responsible for detecting light and color is the?
A. Ear
Correct B. Eye
C. Nose
D. Mouth

Correct Answer: B

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Question 5
The transport system responsible for carrying oxygen and nutrients to the body's cells is the?
Correct A. Circulatory System
B. Respiratory System
C. Digestive System
D. Nervous System

Correct Answer: A

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Question 6
In the context of hormonal coordination, what is the primary function of the hypothalamus in regulating body temperature?
A. To produce heat-shock proteins
B. To stimulate the release of antidiuretic hormone (ADH)
Correct C. To regulate the body's thermoregulatory set point
D. To increase the metabolic rate of brown adipose tissue

Correct Answer: C

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Question 7
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
Correct D. Lens

Correct Answer: D

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Question 8
In a tropical rainforest e\cosystem, what is the primary role of the decomposer community?
A. To produce organic compounds through photosynthesis
Correct B. To break down dead plant and animal matter
C. To form symbiotic relationships with other organisms
D. To regulate the population of herbivores

Correct Answer: B

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Question 9
A diagram of the human digestive system is shown below. Which part of the digestive system is responsible for absorbing nutrients from food?
A. Mouth
B. Esophagus
C. Stomach
Correct D. Small intestine

Correct Answer: D

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Question 10
In the context of classification of living things, what is the primary function of the kingdom level?
A. To group organisms based on their cell structure
B. To group organisms based on their body structure
Correct C. To group organisms based on their metabolic processes
D. To group organisms based on their genetic makeup

Correct Answer: C

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Question 11
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the Δπδαλλεργερ \( anaphase-promoting complex \). What is the primary function of the Δπδαλλεργερ in this context?
Correct A. To degrade the cohe\sin proteins holding sister chromatids together
B. To activate the kinetochore proteins that attach to microtubules
C. To phosphorylate the histone proteins that condense chromatin
D. To recruit the spindle checkpoint proteins that monitor chromosome alignment

Correct Answer: A

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Question 12
A population of Örsted worms (Enchytraeus albidus) is exposed to a mixture of heavy metals (Cu, Zn, and Pb). Which of the following statements best describes the likely effect of this exposure on the population?
A. The population will exhibit increased growth rates due to the synergistic effects of the heavy metals
B. The population will experience reduced growth rates due to the antagonistic effects of the heavy metals
Correct C. The population will exhibit increased mortality rates due to the cumulative effects of the heavy metals
D. The population will experience no significant changes due to the lack of bioavailability of the heavy metals

Correct Answer: C

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Question 13
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. To synthesize ATP during photosynthesis
B. To store water and nutrients
C. To synthesize proteins during translation
Correct D. To regulate cell growth and division

Correct Answer: D

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Question 14
A diagram of a human eye is shown below. What is the function of the structure labeled 'Y'?
A. To focus light onto the retina
Correct B. To regulate the amount of light entering the eye
C. To transmit visual signals to the brain
D. To produce tears to lubricate the eye

Correct Answer: B

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Question 15
A diagram of a human brain is shown below. What is the function of the structure labeled 'Z'?
A. To process visual information
B. To regulate body temperature
C. To control voluntary movements
Correct D. To store and retrieve memories

Correct Answer: D

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Question 16
In a photosynthetic pathway, which of the following pigments is primarily responsible for absorbing light energy in the blue-violet region of the visible spectrum?
A. Chlorophyll a
B. Chlorophyll b
C. Carotenoids
Correct D. Phycobiliproteins

Correct Answer: D

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Question 17
A 2.5-g sample of a subs\tance is dissolved in 25 mL of water. If the molarity of the resulting solution is 0.2 M, what is the molar mass of the subs\tance?
A. 50 g/mol
Correct B. 100 g/mol
C. 150 g/mol
D. 200 g/mol

Correct Answer: B

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Question 18
A cell is placed in a solution with a pH of 7. If the cell membrane has a permeability coefficient of 1.5 x 10^-5 cm/s, what is the rate of diffusion of water across the membrane?
A. 2.5 x 10^-6 cm/s
Correct B. 5.48 x 10^-6 cm/s
C. 8.5 x 10^-6 cm/s
D. 1.2 x 10^-5 cm/s

Correct Answer: B

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Question 19
A 50-g sample of a subs\tance is burned in a bomb calorimeter. If the heat released is 250 J/g, what is the total heat released?
A. 10000 J
Correct B. 12500 J
C. 15000 J
D. 20000 J

Correct Answer: B

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Question 20
A 1.5-L sample of a gas is collected over water at a temperature of 25°C and a pressure of 1 atm. If the vapor pressure of water at 25°C is 23.8 mmHg, what is the partial pressure of the gas?
A. 700 mmHg
Correct B. 743.8 mmHg
C. 800 mmHg
D. 850 mmHg

Correct Answer: B

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Question 21
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?
Correct A. 0.16
B. 0.24
C. 0.32
D. 0.36

Correct Answer: A

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Question 22
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 23
A solution of glu\cose is prepared by dissolving 10g of glu\cose in 100ml of water. What is the concentration of the solution in g/dm^3?
Correct A. 10g/dm^3
B. 20g/dm^3
C. 30g/dm^3
D. 40g/dm^3

Correct Answer: A

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Question 24
A diagram of the human respiratory system is shown below. Which part of the system is responsible for exchanging oxygen and carbon dioxide?
A. Trachea
B. Bronchi
Correct C. Alveoli
D. Diaphragm

Correct Answer: C

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Question 25
A population of bacteria is growing exponentially. If the initial population is 100 and the population doubles every 2 hours, what is the population after 6 hours?
A. 1600
B. 3200
Correct C. 6400
D. 12800

Correct Answer: C

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