POST UTME UNN 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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. 0.48
D. 0.16
Question 2
A solution contains 0.1 M NaCl and 0.1 M glu\cose. What is the total osmotic pressure of the solution at 25°C?
A. 1.0 atm
B. 1.5 atm
C. 2.0 atm
D. 2.5 atm
Question 3
A diagram of the water cycle is shown below. Which process is responsible for the formation of clouds?
A. Evaporation
B. Condensation
C. Precipitation
D. Runoff
Question 4
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. 0.5
C. 0.75
D. 0.9
Question 5
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole
Question 6
In a population of 1000 individuals, 20% are homozygous dominant, 40% are heterozygous, and 40% are homozygous recessive. What is the frequency of the recessive allele?
A. 0.2
B. 0.4
C. 0.6
D. 0.8
Question 7
The process of photosynthesis in plants involves the conversion of carbon dioxide and water into glu\cose and oxygen through the action of
A. chlorophyll
B. cell wall
C. vacuole
D. mitochondria
Question 8
A 20 mL sample of a solution containing 0.2 M NaCl is added to a 100 mL sample of a solution containing 0.1 M NaCl. 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 9
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. 0.5
C. 0.75
D. 0.9
Question 10
In a population of 1000 individuals, the frequency of the dominant allele is 0.6. What is the expected frequency of the recessive allele?
A. 0.4
B. 0.2
C. 0.8
D. 0.1
Question 11
The human eye has a lens that can change shape to focus on objects at different dis\tances. This is an example of
A. accommodation
B. convergence
C. divergence
D. re\fraction
Question 12
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the Hardy-Weinberg principle holds, what is the expected frequency of the homozygous dominant genotype 'RR'?
A. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 13
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'RR'?
A. 0.4
B. 0.6
C. 0.8
D. 0.2
Question 14
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'RR'?
A. 0.36
B. 0.64
C. 0.44
D. 0.56
Question 15
A researcher is studying the effect of a new medication on blood pressure. The data shows a significant decrease in blood pressure after treatment. What type of statistical analysis would be most appropriate to use?
A. t-test
B. ANOVA
C. Regression analysis
D. Chi-square test

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