POST UTME CALEB UNIVERSITY 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A population of rabbits is growing according to the \logistic growth equation. If the initial population is 100, the carrying capacity is 1000, and the growth rate is 0.5, what is the population after 5 years?
A. 500
B. 600
C. 700
D. 800
Question 2
In a population of 1000 individuals, 20% are homozygous dominant, 40% are heterozygous, and 40% are homozygous recessive. What is the probability that two individuals chosen at random will have offspring with the dominant trait?
A. 0.36
B. 0.48
C. 0.64
D. 0.72
Question 3
A plant has a genotype of 'Rr' for the flower color gene. If the plant is self-pollinated, what is the probability that the offspring will have the genotype 'RR'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 4
A cell is placed in a hypertonic solution. What will happen to the cell?
A. The cell will swell and eventually burst
B. The cell will shrink and eventually die
C. The cell will remain unchanged
D. The cell will increase in size
Question 5
A researcher is studying the effect of a new fertilizer on the growth of a certain species of plant. The fertilizer has a 20% increase in growth rate. If the initial growth rate of the plant is 10 cm/day, what is the expected growth rate after 10 days?
A. 12 cm/day
B. 14 cm/day
C. 16 cm/day
D. 18 cm/day
Question 6
A cell is placed in a medium with a pH of 7.5. If the cell has a buffering capacity of 0.1 M, what is the concentration of hydrogen ions in the medium?
A. 1.0 \times 10^{-6}
B. 1.0 \times 10^{-7.5}
C. 1.0 \times 10^{-8}
D. 1.0 \times 10^{-9}
Question 7
A species of bird has a wing span of 1.5 meters. If the bird is flying at a speed of 50 km/h, what is the angle of attack of the wing?
A. 10°
B. 20°
C. 30°
D. 40°
Question 8
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 homozygous dominant genotype 'AA'?
A. 0.36
B. 0.64
C. 0.8
D. 0.16
Question 9
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 homozygous dominant genotype 'AA'?
A. 0.36
B. 0.64
C. 0.72
D. 0.88
Question 10
A 10% solution of salt is prepared by dissolving 10g of salt in 90g of water. What is the mass of salt in a 200ml solution?
A. 22.2g
B. 25g
C. 27.8g
D. 30g
Question 11
In the process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Active transport of ions across the renal tubular epithelium
B. Passive diffusion of ions through the renal tubular epithelium
C. Excretion of excess ions in the urine
D. Reabsorption of ions from the filtrate
Question 12
What is the primary function of the Golgi apparatus in a cell?
A. Protein synthesis
B. Cell signaling
C. Lipid synthesis
D. Modification and packaging of proteins and lipids
Question 13
A patient is experiencing symptoms of a hormonal imbalance. Which of the following glands is responsible for producing the hormone that regulates the body's response to stress?
A. Pituitary gland
B. Thyroid gland
C. Adrenal gland
D. Pancreas
Question 14
A population of bacteria is growing exponentially. What is the rate of growth of the population?
A. The rate of growth is cons\tant
B. The rate of growth is proportional to the size of the population
C. The rate of growth is inversely proportional to the size of the population
D. The rate of growth is zero
Question 15
A cell divides by mitosis to produce two daughter cells. If the original cell has 16 chromosomes, how many chromosomes will each daughter cell have?
A. 8
B. 16
C. 32
D. 64

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