POST UTME UNIOSUN 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of the human respiratory system is shown below. Which part of the system is responsible for the exchange of oxygen and carbon dioxide?
A. A
B. B
C. C
D. D
Question 2
The microorganism responsible for cau\sing tuberculosis in humans is the?
A. Bacillus anthracis
B. Mycobacterium tuberculosis
C. Escherichia coli
D. Staphylococcus aureus
Question 3
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of glu\cose. Which of the following is a by-product of this process?
A. Oxygen
B. Carbon dioxide
C. Water
D. Nitrogen
Question 4
A patient is experiencing symptoms of a viral infection. Which of the following types of microorganisms is most likely responsible?
A. Bacteria
B. Fungi
C. Viruses
D. Protozoa
Question 5
The process of evolution involves the change in the frequency of alleles in a population over time. Which of the following mechanisms of evolution is responsible for the increase in the frequency of a beneficial allele?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 6
The process of respiration involves the breakdown of glu\cose to produce what?
A. ATP and water
B. ATP and carbon dioxide
C. Water and carbon dioxide
D. ATP and oxygen
Question 7
The diagram below shows the structure of the human eye. What is the function of the retina?
A. To focus light on the lens
B. To detect light and transmit signals to the brain
C. To regulate the amount of light entering the eye
D. To produce tears
Question 8
A diagram of the human nervous system is shown below. What is the function of the part labeled A?
A. To transmit sensory information to the brain
B. To regulate body temperature
C. To control voluntary movements
D. To produce hormones
Question 9
A plant cell has a vacuole that contains 0.5 M sucrose solution. If the cell membrane is selectively permeable, what is the concentration of sucrose in the cytosol after 10 minutes?
A. 0.1 M
B. 0.3 M
C. 0.5 M
D. 0.7 M
Question 10
In the human eye, the lens focuses light onto the retina, which contains specialized cells called photoreceptors. What is the primary function of the photoreceptors in the retina?
A. To convert light into electrical signals
B. To focus light onto the retina
C. To detect color and brightness
D. To regulate the amount of light entering the eye
Question 11
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
B. 0.64
C. 0.72
D. 0.84
Question 12
A study on the genetic variation of a population found that the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?
A. 0.2
B. 0.4
C. 0.6
D. 0.8
Question 13
A cell is in the G2 phase of the cell cycle. If the cell is treated with a drug that inhibits DNA replication, what will happen to the cell?
A. The cell will undergo mitosis and divide
B. The cell will enter the G1 phase
C. The cell will die
D. The cell will enter the G0 phase
Question 14
The process of digestion in the human body involves the breakdown of food into smaller molecules. Which of the following enzymes is responsible for breaking down proteins?
A. Amylase
B. Lipase
C. Tryp\sin
D. Lactase
Question 15
A diagram of the human digestive system is shown below. What is the function of the part labeled B?
A. To absorb nutrients into the bloodstream
B. To break down proteins into amino acids
C. To store waste until it is eliminated
D. To produce hormones that regulate digestion

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