POST UTME DELSU 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 structures is responsible for the accommodation of light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 2
A bacterium is placed in a medium with a pH of 7.0. If the bacterium grows and the pH of the medium increases to 8.0, what is the expected change in the growth rate of the bacterium?
A. Decreases by 20%
B. Increases by 20%
C. Remains the same
D. Increases by 50%
Question 3
In a population of 1000 individuals, 70% are homozygous dominant (BB), 20% are heterozygous (Bb), and 10% are homozygous recessive (bb). What is the probability that two individuals chosen at random will have offspring with the BB genotype?
A. 0.35
B. 0.45
C. 0.55
D. 0.65
Question 4
A 30-year-old woman presents with symptoms of hyperthyroidism. Her TSH level is suppressed at 0.5 mU/L. Which of the following is the most likely cause of her condition?
A. Thyroiditis
B. Thyroid cancer
C. Autoimmune thyroiditis
D. Thyroid nodules
Question 5
A species of bird has a beak length of 5 cm. If the beak length is increased by 10% every generation, what will be the beak length of the bird's great-great-grandchild?
A. 7.5 cm
B. 8.5 cm
C. 9.5 cm
D. 10.5 cm
Question 6
A 2.0 M solution of glu\cose is diluted to 0.5 M. What is the volume of the solvent added to the solution?
A. 50 mL
B. 100 mL
C. 200 mL
D. 500 mL
Question 7
A cell is placed in a hypotonic solution. What will happen to the cell?
A. The cell will shrink
B. The cell will swell
C. The cell will remain unchanged
D. The cell will burst
Question 8
A 2.5 L flask contains 0.5 M NaOH. If 25 mL of 1.5 M HCl is slowly added to the flask, what is the resulting concentration of the solution?
A. 0.6 M
B. 0.8 M
C. 1.0 M
D. 1.2 M
Question 9
In a population of 1000 individuals, 60% are heterozygous for the gene controlling the flower color. If 20% of the population is homozygous dominant, what is the frequency of the recessive allele?
A. 0.25
B. 0.33
C. 0.5
D. 0.67
Question 10
A diagram of a cell is shown below. What is the function of the structure labeled 'A'?
A. Mitochondria
B. Nucleus
C. Endoplasmic Reticulum
D. Lysosome
Question 11
A plant is placed in a greenhouse with a temperature of 25°C and a relative humidity of 60%. What is the expected rate of transpiration?
A. High
B. Medium
C. Low
D. Very low
Question 12
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. 0.16
B. 0.36
C. 0.64
D. 0.84
Question 13
A researcher is studying the effect of temperature on the rate of a chemical reaction. The researcher measures the rate of the reaction at different temperatures and plots the data on a graph. Which of the following types of graphs would best represent the data?
A. Line graph
B. Bar graph
C. Scatter plot
D. Histogram
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?
A. 0.36
B. 0.64
C. 0.16
D. 0.04
Question 15
A diagram of the human respiratory system is shown below. Which of the following structures is responsible for the exchange of oxygen and carbon dioxide?
A. Trachea
B. Lungs
C. Diaphragm
D. Bronchi

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