POST UTME MADONNA UNIVERSITY 2022 Biology | Objective

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Question 1 View Details
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'?
Correct A. 0.64
B. 0.36
C. 0.16
D. 0.04

Correct Answer: A

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Question 2 View Details
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. Site of protein synthesis
B. Site of cell division
C. Site of cell growth
Correct D. Site of cell differentiation

Correct Answer: D

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Question 3 View Details
A diagram of a human respiratory system is shown below. What is the function of the structure labeled 'Y'?
Correct A. Site of gas exchange
B. Site of air filtration
C. Site of air humidification
D. Site of air warming

Correct Answer: A

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Question 4 View Details
A diagram of a human digestive system is shown below. What is the function of the structure labeled 'Z'?
A. Site of mechanical digestion
Correct B. Site of chemical digestion
C. Site of absorption
D. Site of elimination

Correct Answer: B

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Question 5 View Details
A diagram of a human circulatory system is shown below. What is the function of the structure labeled 'W'?
A. Site of blood filtration
B. Site of blood clotting
C. Site of blood pressure regulation
Correct D. Site of blood flow regulation

Correct Answer: D

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Question 6 View Details
In a desert e\cosystem, the primary producers are cacti and succulents. What is the role of these plants in the e\cosystem?
A. They are the primary consumers of the e\cosystem.
Correct B. They are the producers of the e\cosystem.
C. They are the decomposers of the e\cosystem.
D. They are the scavengers of the e\cosystem.

Correct Answer: B

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Question 7 View Details
A 2.5-liter solution of 0.5 M NaCl is diluted by adding 1.5 liters of water. What is the new concentration of the solution?
A. 0.25 M
Correct B. 0.3125 M
C. 0.375 M
D. 0.5 M

Correct Answer: B

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Question 8 View Details
A diagram of the human eye is shown below.
A. The cornea is the transparent part of the eye.
B. The iris is the colored part of the eye.
Correct C. The pupil is the opening at the center of the eye.
D. The retina is the light-sensitive tissue at the back of the eye.

Correct Answer: C

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Question 9 View Details
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. 490 N
Correct B. 590 N
C. 690 N
D. 790 N

Correct Answer: B

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Question 10 View Details
A diagram of the human respiratory system is shown below.
A. The trachea is the tube that carries air from the nose and mouth to the lungs.
B. The bronchi are the tubes that branch off from the trachea to the lungs.
Correct C. The alveoli are the tiny air sacs where gas exchange occurs.
D. The diaphragm is the muscle that separates the chest cavity from the abdominal cavity.

Correct Answer: C

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Question 11 View Details
In a typical human cell, the process of meiosis is initiated by the breakdown of the following structure:
Correct A. Nucleus
B. Mitochondria
C. Endoplasmic Reticulum
D. Lysosome

Correct Answer: A

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Question 12 View Details
The diagram below shows the structure of a plant cell. Which of the following organelles is responsible for photosynthesis?
A. Mitochondria
Correct B. Chloroplast
C. Vacuole
D. Nucleus

Correct Answer: B

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Question 13 View Details
The process of mitosis is characterized by the following stages:
Correct A. Prophase, Metaphase, Anaphase, Telophase
B. Interphase, Prophase, Metaphase, Anaphase
C. Prophase, Metaphase, Anaphase, Cytokinesis
D. Interphase, Prophase, Metaphase, Telophase

Correct Answer: A

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Question 14 View Details
The diagram below shows the structure of a human eye. Which of the following parts is responsible for detecting light?
A. Iris
B. Cornea
Correct C. Retina
D. Lens

Correct Answer: C

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Question 15 View Details
The process of asexual reproduction in plants is characterized by the following method:
A. Budding
Correct B. Fragmentation
C. Regeneration
D. Spore formation

Correct Answer: B

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Question 16 View Details
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. 0.48
D. 0.72

Correct Answer: B

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Question 17 View Details
A student is studying the structure of a plant cell. Which of the following organelles is responsible for photosynthesis?
A. Mitochondria
Correct B. Chloroplast
C. Vacuole
D. Nucleus

Correct Answer: B

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Question 18 View Details
A researcher is studying the excretory system of a frog. Which of the following organs is responsible for the removal of waste products from the body?
A. Liver
Correct B. Kidney
C. Bladder
D. Pancreas

Correct Answer: B

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Question 19 View Details
A student is studying the classification of living things. Which of the following kingdoms is characterized by the presence of cell walls made of cellulose?
A. Animalia
B. Fungi
Correct C. Plantae
D. Protista

Correct Answer: C

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Question 20 View Details
A researcher is studying the structure of a cell. Which of the following organelles is responsible for protein synthesis?
A. Mitochondria
Correct B. Ribosome
C. Endoplasmic Reticulum
D. Lysosome

Correct Answer: B

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Question 21 View Details
In a plant cell, the xylem is responsible for transporting water and minerals from the roots to the leaves through the process of
Correct A. Transpiration
B. Photosynthesis
C. Osmosis
D. Diffusion

Correct Answer: A

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Question 22 View Details
The process of respiration in plants involves the breakdown of glu\cose to produce energy in the form of ATP, which is then used to power the movement of
A. Protons
Correct B. Electrons
C. Ions
D. Molecules

Correct Answer: B

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Question 23 View Details
The microorganism responsible for cau\sing tuberculosis in humans is
A. Escherichia coli
B. Staphylococcus aureus
Correct C. Mycobacterium tuberculosis
D. Salmonella typhi

Correct Answer: C

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Question 24 View Details
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 NOT a product of digestion?
A. Glu\cose
B. Amino acids
C. Fatty acids
Correct D. Water

Correct Answer: D

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Question 25 View Details
The classification of living things is based on the following characteristics: cell structure, body organization, metabolism, response to stimuli, and
Correct A. Genetic information
B. Evolutionary history
C. Eco\logical niche
D. Reproduction method

Correct Answer: A

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