POST UTME ABU 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In asexual reproduction, the offspring are genetically identical to the parent because they?
A. Inherit different alleles of the same gene
B. Inherit different genes from each parent
C. Inherit only one set of chromosomes
D. Inherit only one allele of each gene
Question 2
The process of natural selection can lead to the evolution of a population in which the average height of individuals increases over time. Which of the following is a likely explanation for this phenomenon?
A. Genetic drift
B. Mutation
C. Gene flow
D. Artificial selection
Question 3
The graph below shows the relationship between the concentration of a substrate and the rate of enzyme activity. What is the name of the enzyme that catalyzes this reaction?
A. Amylase
B. Lactase
C. Tryp\sin
D. Pep\sin
Question 4
A diagram of the human eye is shown below. Which of the following is a function of the cornea?
A. To focus light on the retina
B. To re\fract light entering the eye
C. To produce tears
D. To regulate the amount of light entering the eye
Question 5
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 dominant allele 'A'?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 6
A diagram of a plant cell is shown below. Which part of the cell is responsible for photosynthesis?
A. Mitochondria
B. Chloroplast
C. Endoplasmic reticulum
D. Golgi apparatus
Question 7
A diagram of a human eye is shown below. Identify the part labeled 'B'.
A. Cornea
B. Iris
C. Lens
D. Retina
Question 8
A 2.5 L flask contains a mixture of N2 and O2 gases at 25°C and 1 atm. If 1.5 L of the mixture is removed and replaced with N2, what is the new mole \fraction of O2?
A. 0.12
B. 0.15
C. 0.18
D. 0.21
Question 9
In the context of genetics, what is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic drift
C. Natural selection
D. Heritability
Question 10
The diagram below shows a simple harmonic motion. Which of the following is a likely consequence of increa\sing the amplitude of the motion?
A. The frequency of the motion will increase
B. The period of the motion will decrease
C. The amplitude of the motion will increase
D. The energy of the motion will decrease
Question 11
The process by which an organism's genetic information is passed from one generation to the next is known as?
A. Genetic drift
B. Natural selection
C. Mutation
D. Heritability
Question 12
The diagram below shows the structure of a mitochondrion. Which part of the mitochondrion is responsible for generating most of the cell's supply of adeno\sine triphosphate (ATP)?
A. A
B. B
C. C
D. D
Question 13
A diagram of the human brain is shown below. Which part of the brain is responsible for regulating body temperature?
A. Hypothalamus
B. Cerebellum
C. Pons
D. Medulla oblongata
Question 14
A population of 1000 organisms is divided into 10 groups of 100 organisms each. If 10% of the organisms in each group are randomly sampled, what is the probability that at least one group will contain no homozygous recessive individuals?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 15
In a tropical rainforest e\cosystem, what is the primary mechanism by which nutrients are cycled between organisms?
A. Decomposition
B. Photosynthesis
C. Respiration
D. Transpiration

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