POST UTME BSU 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.0 L solution of 0.5 M glu\cose is diluted to a volume of 5.0 L. 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 2
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
Question 3
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 4
The classification of living things is based on their characteristics and evolutionary relationships. Which of the following is a characteristic of kingdom Animalia?
A. Multicellularity
B. Cell wall
C. Flagella
D. Symbiotic relationship with other organisms
Question 5
The excretory system is responsible for removing waste products from the body. Which of the following is a function of the kidneys?
A. Regulation of blood pressure
B. Production of red blood cells
C. Removal of waste products from the blood
D. Regulation of body temperature
Question 6
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 7
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 8
What is the primary function of the pituitary gland in regulating growth and development?
A. To produce growth hormone and thyroid-stimulating hormone
B. To produce adrenocorticotropic hormone and follicle-stimulating hormone
C. To produce prolactin and growth hormone
D. To produce thyroid-stimulating hormone and adrenocorticotropic hormone
Question 9
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 10
A 5% solution of salt is mixed with a 10% solution of salt. What is the resulting concentration of salt in the mixture?
A. 6.25%
B. 7.50%
C. 8.75%
D. 10.00%
Question 11
A gene has two alleles, A and a. The genotype of a plant is Aa. What is the probability that the plant will produce an offspring with the genotype AA?
A. 0.25
B. 0.5
C. 0.75
D. 1
Question 12
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 13
A population of bacteria is growing exponentially. If the initial population is 100 and the growth rate is 20% per hour, what will be the population after 3 hours?
A. 1600
B. 2000
C. 2500
D. 3000
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
A population of 1000 individuals has a mean height of 170 cm and a s\tandard deviation of 10 cm. What is the probability that a randomly selected individual will have a height greater than 180 cm?
A. 0.10
B. 0.20
C. 0.30
D. 0.40

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