POST UTME DELSU 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a plant cell, the process of photosynthesis occurs in the chloroplast. Which of the following pigments is responsible for absorbing light energy?
A. Chlorophyll a
B. Chlorophyll b
C. Carotenoids
D. Phycobiliproteins
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
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 4
In a tropical rainforest e\cosystem, what is the primary role of the decomposer community?
A. To produce organic compounds from inorganic subs\tances
B. To break down complex organic molecules into simpler subs\tances
C. To synthesize new organic compounds from inorganic subs\tances
D. To regulate the population of primary producers
Question 5
What is the primary difference between a simple epithelium and a stratified epithelium?
A. Number of cell layers
B. Type of cells present
C. Function of the epithelium
D. Location in the body
Question 6
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 7
A diagram of a plant cell is shown below. What is the function of the part labeled 'E'?
A. To synthesize proteins
B. To store water and nutrients
C. To undergo photosynthesis
D. To generate energy for the cell
Question 8
In a population of 1000 bacteria, 80% are resis\tant to antibiotic A. If 200 bacteria are randomly selected for treatment, what is the probability that at least 150 will be resis\tant to antibiotic A?
A. 0.25
B. 0.30
C. 0.35
D. 0.40
Question 9
A plant has a genotype of BBRR. If the plant is crossed with a plant having the genotype bbrr, what is the probability that the offspring will have the trait of being red?
A. 0.25
B. 0.5
C. 0.75
D. 1.0
Question 10
The process of genetic variation in a population can occur through mutation, gene flow, genetic drift, or natural selection. Which of the following is an example of genetic drift?
A. Mutation
B. Gene flow
C. Genetic drift
D. Natural selection
Question 11
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 12
A patient has a visual impairment that affects their ability to perceive colors. Which of the following sense organs is responsible for color perception?
A. Eye
B. Ear
C. Nose
D. Tongue
Question 13
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 14
In a population of 1000 individuals, 70% are heterozygous for the gene controlling the flower color. If 20% of the population is homozygous recessive, what is the frequency of the recessive allele?
A. 0.2
B. 0.3
C. 0.4
D. 0.5
Question 15
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

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