POST UTME BSU 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
What is the primary function of the olfactory epithelium in the sense organ of smell?
A. To detect chemical signals in the air
B. To detect mechanical signals in the air
C. To detect electrical signals in the air
D. To detect thermal signals in the air
Question 2
In the context of reproduction, what is the primary function of the vas deferens in males?
A. To store sperm
B. To transport sperm
C. To produce sperm
D. To regulate sperm production
Question 3
The process of osmoregulation in animals involves the regulation of water and salt balance in the body. Which of the following is a key mechanism involved in osmoregulation?
A. Active transport of ions across cell membranes
B. Passive diffusion of water across cell membranes
C. Excretion of excess salt through the kidneys
D. Ingestion of salt-rich foods
Question 4
The respiratory system is responsible for exchanging gases between the body and the environment. Which of the following is NOT a function of the respiratory system?
A. Regulation of body temperature
B. Exchange of oxygen and carbon dioxide
C. Production of red blood cells
D. Regulation of blood pressure
Question 5
What is the primary mechanism of gas exchange in the lungs?
A. Diffusion of oxygen and carbon dioxide through the alveolar-capillary membrane
B. Osmosis of oxygen and carbon dioxide through the alveolar-capillary membrane
C. Active transport of oxygen and carbon dioxide through the alveolar-capillary membrane
D. Passive transport of oxygen and carbon dioxide through the alveolar-capillary membrane
Question 6
The diagram below shows a simplified model of the human excretory system. Which part of the excretory system is responsible for filtering waste from the blood?
A. Kidneys
B. Ureters
C. Bladder
D. Urethra
Question 7
In the context of hormonal coordination, what is the primary function of the hypothalamus in regulating body temperature?
A. To maintain a cons\tant body temperature through sweating and shivering
B. To regulate body temperature by controlling the release of hormones
C. To maintain a cons\tant body temperature through behavioral adaptations
D. To regulate body temperature by controlling the release of hormones and behavioral adaptations
Question 8
A plant with the genotype AaBb is crossed with a plant with the genotype AaBb. What is the probability that the offspring will have the genotype AaBb?
A. 0.25
B. 0.50
C. 0.75
D. 0.90
Question 9
The diagram below shows a simplified model of the human nervous system. Which part of the nervous system is responsible for controlling voluntary movements?
A. Brain
B. Spinal Cord
C. Peripheral Nervous System
D. Central Nervous System
Question 10
A cell has a diameter of 10 μm and a length of 20 μm. If the cell is placed in a solution with a vis\cosity of 0.01 Pa·s, what is the force required to move the cell at a velocity of 0.1 mm/s?
A. 0.1 μN
B. 1.0 μN
C. 10.0 μN
D. 100.0 μN
Question 11
The diagram below shows a cross-section of the human eye. Which part of the eye is responsible for detecting light and color?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 12
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
D. Lens
Question 13
What is the primary mechanism of asexual reproduction in plants?
A. Fragmentation of plants into smaller parts
B. Budding of plants through the formation of new buds
C. Spore formation in plants
D. Vegetative propagation of plants through cuttings
Question 14
A 5.0 g sample of glu\cose is dissolved in 100 mL of water. What is the concentration of glu\cose in the resulting solution?
A. 0.05 M
B. 0.1 M
C. 0.2 M
D. 0.5 M
Question 15
In the classification of living things, what is the primary characteristic that distinguishes between prokaryotes and eukaryotes?
A. Cell wall
B. Chloroplasts
C. Presence of a true nucleus
D. Flagella

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