POST UTME NILE UNIVERSITY 2020 Biology | Objective

Are you preparing for POST UTME NILE UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2020 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 bacteria, 80% are sensitive to antibiotic A and 20% are resis\tant. If 1000 units of antibiotic A are administered, what is the expected number of bacteria that will be killed?
A. 600
Correct B. 800
C. 1000
D. 1200

Correct Answer: B

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Question 2
A diagram of a cell is shown below. Identify the part labeled 'A'.
Correct A. Mitochondria
B. Nucleus
C. Ribosome
D. Lysosome

Correct Answer: A

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Question 3
A 5% solution of glu\cose is prepared by dissolving 5 grams of glu\cose in 95 grams of water. What is the mass of glu\cose in a 250 mL solution?
A. 12.5
Correct B. 13.16
C. 15.0
D. 17.5

Correct Answer: B

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Question 4
A diagram of a simple harmonic motion is shown below. Identify the type of motion.
Correct A. Simple Harmonic Motion
B. Damped Harmonic Motion
C. Forced Harmonic Motion
D. Oscillatory Motion

Correct Answer: A

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Question 5
A 0.5 M solution of NaOH is prepared by dissolving 40 grams of NaOH in 1000 mL of water. What is the pH of the solution?
Correct A. 0.3
B. 1.0
C. 2.0
D. 3.0

Correct Answer: A

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Question 6
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. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
Correct C. No gene flow
D. No genetic drift

Correct Answer: C

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Question 7
The xylem sap of a plant contains a high concentration of which of the following solutes?
A. Glu\cose
B. Sucrose
C. Amino acids
Correct D. Mineral ions

Correct Answer: D

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Question 8
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of which of the following?
A. ATP
B. NADPH
Correct C. Glu\cose
D. Oxygen

Correct Answer: C

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Question 9
The human body has a unique system for transporting gases between the lungs and the bloodstream. Which of the following is a key component of this system?
Correct A. Alveoli
B. Capillaries
C. Pulmonary artery
D. Bronchioles

Correct Answer: A

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Question 10
The process of digestion in the human body involves the breakdown of complex molecules into simpler ones. Which of the following enzymes plays a key role in this process?
A. Amylase
B. Lipase
Correct C. Tryp\sin
D. Pep\sin

Correct Answer: C

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Question 11
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. To synthesize glu\cose
B. To break down glu\cose
Correct C. To generate ATP
D. To produce NADH

Correct Answer: C

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Question 12
A diagram of the human eye is shown below. What is the function of the lens?
Correct A. To focus light on the retina
B. To detect light intensity
C. To produce tears
D. To regulate pupil size

Correct Answer: A

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Question 13
A cell is placed in a solution with a concentration of 0.1 M glu\cose. What is the equilibrium concentration of glu\cose inside the cell?
Correct A. 0.05 M
B. 0.1 M
C. 0.2 M
D. 0.5 M

Correct Answer: A

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Question 14
A diagram of the human kidney is shown below. What is the function of the nephron?
Correct A. To filter waste from the blood
B. To regulate blood pressure
C. To produce urine
D. To store waste

Correct Answer: A

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Question 15
A diagram of the human brain is shown below. What is the function of the cerebellum?
Correct A. To control movement
B. To regulate emotions
C. To process sensory information
D. To store memories

Correct Answer: A

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Question 16
In a tropical rainforest e\cosystem, the presence of a large population of herbivores can lead to a decrease in the population of a specific plant species. However, this decrease in plant population can have a cascading effect on the entire e\cosystem. Which of the following best describes this phenomenon?
Correct A. Trophic cascade
B. Predator-prey cycle
C. Competition for resources
D. Mutualism

Correct Answer: A

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Question 17
A plant's ability to undergo photosynthesis is dep\endent on the presence of which of the following?
A. Water
B. Carbon dioxide
C. Light energy
Correct D. All of the above

Correct Answer: D

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Question 18
In a human body, the transport of oxygen from the lungs to the tissues is primarily facilitated by which of the following?
A. Xylem
B. Phloem
Correct C. Blood
D. Lymph

Correct Answer: C

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Question 19
A microorganism that is capable of cau\sing disease in humans is known as a:
Correct A. Pathogen
B. Symbiont
C. Mu\tant
D. Virus

Correct Answer: A

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Question 20
The process by which plants release water vapor into the air is known as:
A. Respiration
B. Photosynthesis
Correct C. Transpiration
D. Evaporation

Correct Answer: C

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Question 21
In a forest e\cosystem, the presence of a keystone species can have a cascading effect on the entire food web. Which of the following species is most likely to be a keystone species?
A. Owl
B. Deer
Correct C. Beaver
D. Wolf

Correct Answer: C

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Question 22
A population of rabbits is growing according to the \logistic growth model. If the initial population size is 100 and the carrying capacity is 1000, what is the population size after 5 generations?
A. 500
Correct B. 750
C. 900
D. 950

Correct Answer: B

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Question 23
A plant has a photosynthetic rate of 10 mg CO2 per hour. If the plant is exposed to light for 8 hours, how much CO2 will it absorb?
A. 80
Correct B. 100
C. 120
D. 140

Correct Answer: B

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Question 24
A person has a blood pressure of 120/80 mmHg. What is the systolic pressure?
A. 80
B. 100
Correct C. 120
D. 140

Correct Answer: C

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Question 25
A plant has a root system that is 50% efficient in absorbing water. If the plant requires 100 mL of water per day, how much water will it absorb from the soil?
A. 50
Correct B. 75
C. 100
D. 125

Correct Answer: B

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