POST UTME CRAWFORD UNIVERSITY 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a eukaryotic cell, what is the primary function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
C. Modification and packaging of proteins and lipids
D. Cell division
Question 2
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 3
A 2 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. What is the frequency of the resulting simple harmonic motion?
A. 0.5 Hz
B. 1 Hz
C. 2 Hz
D. 5 Hz
Question 4
In a population of 1000 individuals, the frequency of the dominant allele (A) is 0.6, and the frequency of the recessive allele (a) is 0.4. What is the expected genotype and phenotype distribution in the offspring of two heterozygous parents (Aa) u\sing the Hardy-Weinberg principle?
A. Genotype: 36 AA, 432 Aa, 532 aa; Phenotype: 36 AA, 432 Aa, 532 aa
B. Genotype: 36 AA, 432 Aa, 532 aa; Phenotype: 36 AA, 432 Aa, 532 aa
C. Genotype: 36 AA, 432 Aa, 532 aa; Phenotype: 36 AA, 432 Aa, 532 aa
D. Genotype: 36 AA, 432 Aa, 532 aa; Phenotype: 36 AA, 432 Aa, 532 aa
Question 5
In the context of respiration and gas exchange, what is the primary function of the alveoli?
A. To exchange oxygen and carbon dioxide between the lungs and the bloodstream
B. To regulate the body's temperature
C. To remove waste products from the blood
D. To regulate the body's pH level
Question 6
A 2.5 L flask contains 0.5 M NaCl solution. If 1.0 M HCl is slowly added to the solution, what is the concentration of the resulting solution?
A. 0.25 M
B. 0.5 M
C. 0.75 M
D. 1.0 M
Question 7
In the context of transport systems, what is the primary function of the xylem?
A. To transport water and minerals from the roots to the leaves
B. To transport oxygen and carbon dioxide between the lungs and the bloodstream
C. To regulate the body's temperature
D. To remove waste products from the blood
Question 8
A certain species of plant has a photosynthetic rate of 10^\( -5 \) mol CO2/s. If the plant is exposed to light for 8 hours, what is the total amount of CO2 fixed?
A. 10^\( -4 \) mol
B. 10^\( -3 \) mol
C. 6.4 \times 10^\( -3 \) mol
D. 6.4 \times 10^\( -2 \) mol
Question 9
In the context of coordination, what is the primary function of the nervous system?
A. To regulate the body's internal environment
B. To transmit signals from the brain to the rest of the body
C. To control the body's voluntary movements
D. To regulate the body's involuntary movements
Question 10
A plant has a photosynthetic rate of 10 μmol CO2 s^-1 and a stomatal conduc\tance of 0.5 mol m^-2 s^-1. What is the stomatal resis\tance?
A. 0.2 s m^-2
B. 0.5 s m^-2
C. 1.0 s m^-2
D. 2.0 s m^-2
Question 11
A 10 mL sample of a 0.1 M solution of NaOH is added to 20 mL of a 0.2 M solution of HCl. What is the concentration of the resulting solution?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 12
The classification of living things is based on which of the following characteristics?
A. Cell structure
B. Metabolism
C. Genetic information
D. All of the above
Question 13
A 50 kg person is s\tanding on a scale in an elevator. If the elevator accelerates upward at 2 m/s^2, what is the reading on the scale?
A. 400 N
B. 500 N
C. 550 N
D. 600 N
Question 14
A diagram of the respiratory system is shown below. Which of the following structures is responsible for the exchange of oxygen and carbon dioxide?
A. A
B. B
C. C
D. D
Question 15
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

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