POST UTME KSU 2021 Biology | Objective

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Question 1 View Details
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 expected frequency of the homozygous dominant genotype 'AA'?
Correct A. 0.36
B. 0.64
C. 0.72
D. 0.88

Correct Answer: A

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Question 2 View Details
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Mitochondria
B. Chloroplast
Correct C. Nucleus
D. Vacuole

Correct Answer: C

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Question 3 View Details
A 2.5 L flask contains 0.15 mol of CO2 at 27°C. What is the partial pressure of CO2 in the flask?
A. 0.45 atm
Correct B. 0.55 atm
C. 0.65 atm
D. 0.75 atm

Correct Answer: B

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Question 4 View Details
A diagram of a simple harmonic motion is shown below. Identify the part labeled 'B'.
A. Displacement-time graph
B. Velocity-time graph
C. Acceleration-time graph
Correct D. Position-time graph

Correct Answer: D

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Question 5 View Details
A 0.5 M solution of NaOH is prepared by dissolving 10 g of NaOH in 100 mL of water. What is the concentration of NaOH in the solution?
A. 0.25 M
Correct B. 0.5 M
C. 0.75 M
D. 1.0 M

Correct Answer: B

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Question 6 View Details
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 a child with the BB genotype?
Correct A. 0.35
B. 0.45
C. 0.55
D. 0.65

Correct Answer: A

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Question 7 View Details
A researcher is studying the effect of pH on the growth of E. coli. The researcher measures the growth rate of the bacteria at different pH levels and plots the data on a graph. Which of the following statements about the graph is true?
A. The graph shows a direct relationship between pH and growth rate.
Correct B. The graph shows an inverse relationship between pH and growth rate.
C. The graph shows no relationship between pH and growth rate.
D. The graph shows a quadratic relationship between pH and growth rate.

Correct Answer: B

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Question 8 View Details
A patient is diagnosed with a disease that affects the kidneys. The patient's blood urea nitrogen (BUN) level is 40 mg/dL, and the patient's creatinine level is 2.5 mg/dL. What is the patient's estimated glomerular filtration rate (eGFR)?
A. 20 mL/min/1.73 m^2
B. 40 mL/min/1.73 m^2
C. 60 mL/min/1.73 m^2
Correct D. 80 mL/min/1.73 m^2

Correct Answer: D

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Question 9 View Details
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 statements about the graph is true?
Correct A. The graph shows a direct relationship between temperature and reaction rate.
B. The graph shows an inverse relationship between temperature and reaction rate.
C. The graph shows no relationship between temperature and reaction rate.
D. The graph shows a quadratic relationship between temperature and reaction rate.

Correct Answer: A

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Question 10 View Details
A patient is diagnosed with a disease that affects the liver. The patient's liver function tests (LFTs) show elevated levels of alkaline phosphatase (ALP) and \gamma-glutamyl transferase (GGT). What is the most likely diagnosis?
A. Primary biliary cirrhosis
Correct B. Primary sclero\sing cholangitis
C. Autoimmune hepatitis
D. Wilson's disease

Correct Answer: B

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