POST UTME UI 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of the human eye is shown below. Which of the following is the correct function of the part labeled 'A'?
A. To focus light on the retina
B. To detect light intensity
C. To regulate pupil size
D. To produce tears
Question 2
A diagram shows a plant with 5 leaves. If 2 leaves are removed, what is the new number of leaves?
A. 3
B. 5
C. 7
D. 9
Question 3
A diagram of the human nervous system is shown below. Which of the following is the correct function of the part labeled 'B'?
A. To transmit nerve impulses
B. To regulate body temperature
C. To produce hormones
D. To filter blood
Question 4
In a population of 1000 individuals, the frequency of the dominant allele (A) is 0.6 and the frequency of the recessive allele (a) is 0.4. What is the expected frequency of the heterozygous genotype (Aa)?
A. 0.24
B. 0.36
C. 0.48
D. 0.60
Question 5
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
A. 0.36
B. 0.64
C. 0.16
D. 0.04
Question 6
A plant with the genotype 'Rr' is crossed with a plant of genotype 'RR'. What is the probability that the offspring will have the genotype 'rr'?
A. 0%
B. 25%
C. 50%
D. 100%
Question 7
A 20 mL sample of a solution containing 0.2 M NaOH is added to 30 mL of a solution containing 0.1 M HCl. What is the concentration of the resulting solution?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 8
A solution of 1 M glu\cose is diluted to 0.5 M. What is the new volume of the solution?
A. 2.00 L
B. 1.00 L
C. 0.50 L
D. 0.25 L
Question 9
In the context of classification of living things, which of the following is an example of a characteristic that is used to distinguish between prokaryotic and eukaryotic cells?
A. Presence of a true nucleus
B. Presence of mitochondria
C. Presence of a cell wall
D. Presence of ribosomes
Question 10
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. 0.48
D. 0.72
Question 11
The diagram below shows the structure of a plant cell. What is the function of the vacuole?
A. Protein synthesis
B. Cell signaling
C. Storage of water and nutrients
D. DNA replication
Question 12
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
B. 0.50
C. 0.75
D. 1.00
Question 13
A plant with the genotype Rr is crossed with a plant with the genotype rr. What is the probability that the offspring will have the genotype Rr?
A. 0.25
B. 0.50
C. 0.75
D. 1.00
Question 14
The diagram below shows the structure of a mitochondrion. What is the function of the cristae?
A. Protein synthesis
B. Cell signaling
C. Electron transport
D. DNA replication
Question 15
In a diploid cell, what is the ratio of autosomal chromosomes to sex chromosomes during meiosis?
A. 1:1
B. 2:1
C. 1:2
D. 2:2

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