POST UTME UNILORIN 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a human respiratory system is shown below. What is the function of the structure labeled 'Y'?
A. Exchange of oxygen and carbon dioxide
B. Production of surfac\tant
C. Storage of nutrients
D. Production of mucus
Question 2
A solution of glu\cose is placed in a beaker and allowed to diffuse into a solution of water. What is the direction of the net movement of glu\cose molecules?
A. From the glu\cose solution to the water solution
B. From the water solution to the glu\cose solution
C. There is no net movement
D. The movement is random
Question 3
A 0.5-molar solution of HCl is mixed with a 0.5-molar solution of NaOH. What is the resulting pH?
A. 1
B. 2
C. 3
D. 4
Question 4
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'RR'?
A. 1/4
B. 1/2
C. 3/4
D. 1
Question 5
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 6
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. 1/4
B. 1/2
C. 3/4
D. 1
Question 7
A 2.5-liter sample of a gas at 3.0 atm and 25°C is heated to 50°C at cons\tant volume. What is the final pressure of the gas?
A. 4.0 atm
B. 4.5 atm
C. 5.0 atm
D. 5.5 atm
Question 8
In a human cell, the process of mitosis involves the separation of chromosomes into two daughter cells. Which of the following stages of mitosis is characterized by the formation of a spindle apparatus?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 9
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. Photosynthesis
B. Respiration
C. Storage of nutrients
D. Production of hormones
Question 10
In a population of 1000 bacteria, 80% are susceptible to antibiotic treatment, 15% are resis\tant, and 5% are in a latent state. If 200 bacteria are treated with an antibiotic, what is the expected number of bacteria that will be killed?
A. 80
B. 120
C. 160
D. 200
Question 11
A diagram of the human respiratory system is shown below. What is the function of the part labeled 'C'?
A. To exchange oxygen and carbon dioxide
B. To regulate body temperature
C. To produce mucus
D. To detect odors
Question 12
A diagram of the human kidney is shown below. What is the function of the part labeled 'B'?
A. To filter waste from the blood
B. To regulate blood pressure
C. To produce hormones
D. To store urine
Question 13
In a eukaryotic cell, the process of cytokinesis is initiated by the contraction of which of the following structures?
A. Microtubules
B. Microfilaments
C. Intermediate filaments
D. Mitochondria
Question 14
A plant cell has a cell wall composed of cellulose, hemicellulose, and pectin. Which of the following is NOT a primary function of the cell wall?
A. Support and protection
B. Storage of nutrients
C. Transport of water and minerals
D. Regulation of cell growth
Question 15
A population of E. coli is being studied for its response to antibiotic treatment. The initial population size is 10^6 CFU/mL, and the population size decreases to 10^3 CFU/mL after 2 hours of treatment. Assuming a cons\tant death rate, calculate the population growth rate (k) and the doubling time \( t_d \).
A. k = 0.5/hour, t_d = 1.4 hours
B. k = 0.2/hour, t_d = 3.5 hours
C. k = 0.1/hour, t_d = 6.9 hours
D. k = 0.05/hour, t_d = 13.9 hours

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