POST UTME DELSU 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A population of 1000 individuals has a mean height of 160 cm. If the s\tandard deviation is 10 cm, what is the probability that a randomly selected individual has a height greater than 170 cm?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 2
In the xylem, what is the primary function of the tracheids?
A. Transport of water and minerals from roots to leaves
B. Production of sugars through photosynthesis
C. Absorption of water and nutrients by roots
D. Transpiration of water vapor from leaves
Question 3
A cell is placed in a medium with a pH of 5.5. If the cell has a buffering capacity of 0.2 M, what is the concentration of H+ ions in the medium?
A. 0.01 M
B. 0.02 M
C. 0.03 M
D. 0.04 M
Question 4
A neuron is stimulated by an action potential that travels along its axon. What is the primary mechanism by which the action potential is propagated?
A. Electrotonic conduction
B. Saltatory conduction
C. Passive diffusion
D. Active transport
Question 5
A 2.5 kg object is moving in a circular path with a radius of 3.2 m. If the object's speed is 4.5 m/s, what is the magnitude of the net force acting on the object?
A. 10.0 N
B. 12.5 N
C. 15.0 N
D. 17.5 N
Question 6
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' for black eyes is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'B'B'?
A. 0.16
B. 0.36
C. 0.64
D. 0.84
Question 7
U\sing the Hardy-Weinberg principle, what is the frequency of the recessive allele (r) in a population if the frequency of the dominant allele (R) is 0.6?
A. 0.2
B. 0.4
C. 0.6
D. 0.8
Question 8
In the context of evolutionary theory, what is the primary mechanism by which species adapt to their environments?
A. Natural Selection
B. Genetic Drift
C. Gene Flow
D. Mutation
Question 9
The process of osmoregulation in animals involves the regulation of water and ion balance. Which of the following organs plays a crucial role in this process?
A. Kidneys
B. Liver
C. Pancreas
D. Adrenal glands
Question 10
A cell has a membrane potential of -70 mV. If the resting potential is -60 mV, what is the magnitude of the action potential?
A. 10 mV
B. 20 mV
C. 30 mV
D. 40 mV
Question 11
A 2.5 kg object is moving in a circular path with a radius of 3.2 m. If the object's speed is 4.5 m/s, what is the magnitude of the net force acting on the object?
A. 10.0 N
B. 12.5 N
C. 15.0 N
D. 17.5 N
Question 12
In the process of digestion, what is the primary function of the enzyme amylase?
A. Breakdown of proteins into amino acids
B. Breakdown of carbohydrates into simple sugars
C. Breakdown of fats into fatty acids and glycerol
D. Absorption of nutrients into the bloodstream
Question 13
What is the primary function of the mitochondria in a cell?
A. Production of ATP through cellular respiration
B. Breakdown of proteins into amino acids
C. Breakdown of carbohydrates into simple sugars
D. Absorption of nutrients into the bloodstream
Question 14
A cell is placed in a hypertonic solution. What is the primary effect on the cell?
A. The cell will swell and eventually burst
B. The cell will shrink and lose water
C. The cell will remain unchanged
D. The cell will undergo mitosis
Question 15
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope. Which of the following structures is responsible for this breakdown?
A. Nuclear lamina
B. Nuclear envelope
C. Mitotic spindle
D. Centrioles

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