POST UTME CRAWFORD UNIVERSITY 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A population of bacteria is growing exponentially with a growth rate of 0.2 per hour. If the initial population is 1000, what is the population after 5 hours?
A. 10000
B. 5000
C. 2000
D. 1000
Question 2
A cell has a membrane potential of -70 mV. If the cell is stimulated to fire an action potential, what is the maximum rate of change of the membrane potential?
A. 500
B. 1000
C. 1500
D. 2000
Question 3
In a population of 1000 bacteria, 80% are susceptible to a particular antibiotic. If 200 bacteria are exposed to the antibiotic, and 60% of the susceptible bacteria are killed, what is the expected number of surviving bacteria?
A. 180
B. 200
C. 220
D. 240
Question 4
A plant has a root system with a radius of 5 cm and a height of 10 cm. If the plant is placed in a container with a radius of 10 cm and a height of 20 cm, what is the ratio of the volume of the container to the volume of the root system?
A. 4
B. 6
C. 8
D. 10
Question 5
A plant cell has a cell wall, a large central vacuole, and a small nucleus. What is the primary function of the cell wall in this cell?
A. To provide structural support to the cell
B. To regulate the movement of materials in and out of the cell
C. To synthesize proteins and other biomolecules
D. To store genetic information
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 homozygous dominant genotype 'AA'?
A. 0.36
B. 0.64
C. 0.72
D. 0.88
Question 7
In asexual reproduction, which of the following is an example of a type of asexual reproduction?
A. Binary fission
B. Mitosis
C. Meiosis
D. Budding
Question 8
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.5
B. 0.25
C. 0.75
D. 0.33
Question 9
In the process of cellular respiration, what is the primary function of the mitochondria?
A. Production of ATP
B. Production of NADH and FADH2
C. Regulation of cell growth
D. Cell signaling
Question 10
A diagram of a simple electric circuit is shown below. What is the current in the circuit?
A. 2 A
B. 4 A
C. 6 A
D. 8 A
Question 11
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'R'?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 12
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Mitochondria
B. Chloroplast
C. Nucleus
D. Vacuole
Question 13
In the context of classification of living things, what is the primary function of the kingdom level?
A. To group organisms based on their cell structure
B. To categorize organisms based on their genetic makeup
C. To classify organisms based on their body structure
D. To group organisms based on their habitat
Question 14
In the process of mitosis, what is the primary function of the spindle fibers?
A. Separation of chromosomes
B. Attachment of chromosomes to the spindle fibers
C. Formation of the nuclear envelope
D. Regulation of cell growth
Question 15
In the xylem, what is the primary function of the tracheids?
A. Transport of water and minerals from the roots to the leaves
B. Production of sugars through photosynthesis
C. Storage of starch and other nutrients
D. Regulation of water potential in the plant

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