POST UTME ABU 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 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
A. 0.16
B. 0.32
C. 0.64
D. 0.8
Question 2
A 2.5 L flask contains 0.5 mol of an ideal gas at 298 K. What is the pressure of the gas?
A. 1.01 x 10^5 Pa
B. 2.02 x 10^5 Pa
C. 3.03 x 10^5 Pa
D. 4.04 x 10^5 Pa
Question 3
A solution of glu\cose (C6H12O6) has a concentration of 0.5 M. If the volume of the solution is 250 mL, what is the number of moles of glu\cose present?
A. 0.0625
B. 0.125
C. 0.25
D. 0.5
Question 4
A 2.5 cm long muscle fibre is stretched to 3.5 cm. What is the percentage increase in length?
A. 20%
B. 40%
C. 60%
D. 80%
Question 5
In the human visual system, what is the primary function of the optic nerve?
A. To transmit visual information to the brain
B. To regulate pupil size
C. To focus light on the retina
D. To produce tears
Question 6
In the classification of living organisms, what is the primary characteristic used to distinguish between prokaryotes and eukaryotes?
A. Cell wall composition
B. Cell membrane structure
C. Presence of a nucleus
D. Metabolic processes
Question 7
The process by which plants release water vapor into the air is called _______.
A. Transpiration
B. Respiration
C. Photosynthesis
D. Evaporation
Question 8
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. However, this principle assumes a population is infinitely large. What is the term for the phenomenon that occurs when a population is finite and allele frequencies change due to genetic drift?
A. Genetic drift
B. Mutation
C. Gene flow
D. Bottleneck effect
Question 9
The process of natural selection acts on the variation in a population, leading to the adaptation of the population to its environment. Which of the following is a key mechanism of natural selection?
A. Genetic drift
B. Gene flow
C. Mutation
D. Selection
Question 10
A population of rabbits has a growth rate of 0.2 per year. If the initial population size is 100, what is the population size after 5 years?
A. 100
B. 150
C. 263.86
D. 300
Question 11
The diagram below shows the structure of a kidney. What is the function of the nephron?
A. To filter waste from the blood
B. To produce urine
C. To regulate blood pressure
D. To produce hormones
Question 12
In the context of osmoregulation, what is the primary function of the kidneys in maintaining electrolyte balance?
A. To regulate water levels in the body
B. To maintain electrolyte balance by excreting excess ions
C. To regulate pH levels in the body
D. To regulate blood pressure
Question 13
The process by which the body gets rid of waste products and excess subs\tances is called _______.
A. Excretion
B. Respiration
C. Photosynthesis
D. Evaporation
Question 14
The process of symbiotic relationships between organisms can take many forms, including mutualism, commensalism, and parasitism. Which of the following is an example of mutualism?
A. Lion and zebra
B. Clownfish and sea anemone
C. Parasite and host
D. Predator and prey
Question 15
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. 0.16
B. 0.32
C. 0.64
D. 0.8

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