POST UTME ABU 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a population of 1000 organisms, 80% are heterozygous for the gene controlling flower color, while 20% are homozygous recessive. If 10% of the population is randomly sampled, what is the probability that the sample will contain at least one homozygous recessive individual?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 2
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 3
A cell is placed in a solution with a concentration of 0.1 M glu\cose. If the cell is permeable to glu\cose, what is the concentration of glu\cose inside the cell after 30 minutes?
A. 0.05 M
B. 0.075 M
C. 0.1 M
D. 0.125 M
Question 4
A researcher studying the effects of pollution on a freshwater e\cosystem notices that the concentration of a particular pollu\tant in the water is directly proportional to the square root of the number of organisms present. If the concentration of the pollu\tant is 10 mg/L when there are 100 organisms, what is the concentration of the pollu\tant when there are 400 organisms?
A. 5 mg/L
B. 10 mg/L
C. 15 mg/L
D. 20 mg/L
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
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 7
A plant has a genotype of BB and a phenotype of red flowers. If the plant is crossed with a plant having a genotype of bb and a phenotype of white flowers, what is the probability that the offspring will have red flowers?
A. 0.5
B. 0.75
C. 0.9
D. 0.95
Question 8
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
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
What is the primary mechanism by which oxygen is transported from the lungs to the tissues in the human body?
A. Diffusion through the plasma membrane
B. Active transport by the heart
C. Passive transport through the bloodstream
D. Osmosis through the capillary walls
Question 11
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 12
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 13
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 14
The rate of diffusion of a subs\tance through a membrane is influenced by?
A. Concentration gradient
B. Surface area
C. Temperature
D. Pressure
Question 15
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

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