POST UTME IGBINEDION UNIVERSITY 2017 Biology | Objective

Are you preparing for POST UTME IGBINEDION UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2017 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1
In a tropical rainforest, the primary consumers are primarily herbivores. Which of the following organisms would be a primary consumer in this e\cosystem?
A. A deer
Correct B. A grasshopper
C. A fungus
D. A bacterium

Correct Answer: B

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Question 2
The nervous system of a human consists of the central nervous system (CNS) and the peripheral nervous system (PNS). Which of the following is a part of the PNS?
A. The brain
B. The spinal cord
Correct C. The nerves
D. The muscles

Correct Answer: C

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Question 3
The diagram below shows the structure of a plant cell. What is the function of the cell wall?
Correct A. To provide structural support
B. To regulate the movement of subs\tances
C. To synthesize proteins
D. To store genetic information

Correct Answer: A

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Question 4
The excretory system of a human consists of the kidneys, ureters, bladder, and urethra. Which of the following is a function of the kidneys?
A. To synthesize proteins
B. To regulate the movement of subs\tances
Correct C. To filter waste products from the blood
D. To store genetic information

Correct Answer: C

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Question 5
The diagram below shows the structure of a human eye. What is the function of the lens?
A. To regulate the movement of subs\tances
B. To synthesize proteins
Correct C. To focus light on the retina
D. To store genetic information

Correct Answer: C

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Question 6
In a photosynthetic plant, what is the primary function of the light-dep\endent reactions in the thylakoid membrane?
Correct A. To produce ATP and NADPH
B. To synthesize glu\cose from CO2
C. To oxidize water to produce oxygen
D. To reduce NADP+ to NADPH

Correct Answer: A

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Question 7
A 2.5 g sample of a subs\tance is dissolved in 25 mL of water. If the molarity of the solution is 0.5 M, what is the molar mass of the subs\tance?
A. 10 g/mol
B. 20 g/mol
Correct C. 50 g/mol
D. 100 g/mol

Correct Answer: C

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Question 8
A cell membrane is selectively permeable because it has specific channels and transport proteins that allow certain molecules to pass through while keeping others out. What is the primary function of these channels and transport proteins?
Correct A. To regulate the movement of ions and molecules across the membrane
B. To synthesize glu\cose from CO2
C. To oxidize water to produce oxygen
D. To reduce NADP+ to NADPH

Correct Answer: A

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Question 9
A 5.0 g sample of a subs\tance is dissolved in 50 mL of water. If the molarity of the solution is 0.1 M, what is the molar mass of the subs\tance?
A. 20 g/mol
Correct B. 50 g/mol
C. 100 g/mol
D. 200 g/mol

Correct Answer: B

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Question 10
A diagram of a plant cell is shown below. What is the function of the chloroplasts in this cell?
Correct A. To synthesize glu\cose from CO2
B. To oxidize water to produce oxygen
C. To reduce NADP+ to NADPH
D. To store starch and other nutrients

Correct Answer: A

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Question 11
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 true?
A. Random mating
B. No mutation
C. No gene flow
Correct D. No natural selection

Correct Answer: D

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Question 12
In a tropical rainforest, the primary consumers are primarily herbivores. Which of the following is a characteristic of the primary consumers in this e\cosystem?
A. They are primarily carnivores
B. They are primarily detritivores
Correct C. They are primarily herbivores
D. They are primarily omnivores

Correct Answer: C

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Question 13
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. Which of the following is a byproduct of photosynthesis?
Correct A. Oxygen
B. Carbon dioxide
C. Water
D. Glu\cose

Correct Answer: A

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Question 14
The human eye has a unique structure that allows it to detect light and transmit visual information to the brain. Which of the following is a part of the human eye that plays a crucial role in this process?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 15
The process of digestion in the human body involves the breakdown of food into smaller molecules that can be absorbed and utilized by the body. Which of the following is a type of enzyme that plays a crucial role in this process?
A. Amylase
B. Lipase
C. Protease
Correct D. All of the above

Correct Answer: D

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Question 16
In a forest e\cosystem, the presence of a keystone species can lead to a cascade effect on other species. Which of the following is an example of a keystone species?
A. Wolf
B. Grizzly bear
C. Mountain lion
Correct D. Gray wolf

Correct Answer: D

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Question 17
In a photosynthetic pathway, the light-dep\endent reactions occur in the thylakoid membranes of the chloroplast. What is the primary function of the light-dep\endent reactions?
Correct A. To produce ATP and NADPH
B. To produce glu\cose and oxygen
C. To produce starch and cellulose
D. To produce proteins and lipids

Correct Answer: A

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Question 18
In a cell, the process of mitosis is divided into four stages: prophase, metaphase, anaphase, and telophase. What is the primary function of the metaphase stage?
Correct A. To align the chromosomes at the center of the cell
B. To separate the sister chromatids
C. To condense the chromosomes
D. To decondense the chromosomes

Correct Answer: A

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Question 19
In a forest e\cosystem, the presence of a keystone species can lead to a cascade effect on other species. Which of the following is an example of a keystone species?
A. Wolf
B. Grizzly bear
C. Mountain lion
Correct D. Gray wolf

Correct Answer: D

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Question 20
In a photosynthetic pathway, the light-dep\endent reactions occur in the thylakoid membranes of the chloroplast. What is the primary function of the light-dep\endent reactions?
Correct A. To produce ATP and NADPH
B. To produce glu\cose and oxygen
C. To produce starch and cellulose
D. To produce proteins and lipids

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 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'?
A. 0.25
Correct B. 0.5
C. 0.75
D. 0.9

Correct Answer: B

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Question 23
A population of rabbits is growing \logistically with a carrying capacity of 1000 individuals. If the initial population size is 100 individuals, what is the population size after 5 years?
A. 500
B. 750
Correct C. 1000
D. 1250

Correct Answer: C

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Question 24
A plant with the genotype 'RR' is crossed with a plant with the genotype 'rr'. What is the genotype of the offspring?
Correct A. Rr
B. Rr
C. RR
D. rr

Correct Answer: A

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Question 25
A population of bacteria is growing exponentially with a growth rate of 0.2 per hour. If the initial population size is 100 individuals, what is the population size after 3 hours?
A. 200
B. 300
Correct C. 400
D. 500

Correct Answer: C

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