POST UTME ABU 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The diagram below shows the life cycle of a frog. Which of the following is NOT a stage in the life cycle?
A. Egg
B. Tadpole
C. Adult
D. Pupa
Question 2
In the process of osmoregulation, what is the primary function of the kidneys in a hypertonic environment?
A. To excrete excess water
B. To reabsorb excess ions
C. To regulate blood pH
D. To maintain electrolyte balance
Question 3
The reaction 2A + B → 2C is catalyzed by the enzyme A. The enzyme has a Km of 0.5 M and a Vmax of 100 units. If the substrate concentration is 1 M, what is the rate of the reaction?
A. 50 units
B. 66.67 units
C. 75 units
D. 100 units
Question 4
In the context of osmoregulation, what is the primary function of the antidiuretic hormone (ADH) in the kidneys?
A. Regulation of blood pressure
B. Maintenance of electrolyte balance
C. Promotion of water reabsorption in the collecting ducts
D. Stimulation of urine production
Question 5
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. 0.25
B. 0.5
C. 0.75
D. 1
Question 6
A population of Drosophila melanogaster is being studied for its response to a new pesticide. Which of the following evolutionary changes would most likely occur in the population over time?
A. Increased fitness of individuals with the pesticide-resis\tant allele
B. Decreased fitness of individuals with the pesticide-susceptible allele
C. No change in the frequency of the pesticide-resis\tant allele
D. Increased fitness of individuals with the pesticide-susceptible allele
Question 7
A 0.1M solution of NaOH is mixed with a 0.1M solution of HCl. What is the pH of the resulting solution?
A. 7
B. 8
C. 9
D. 10
Question 8
In the process of cellular respiration, what is the primary function of the mitochondria?
A. To generate ATP
B. To synthesize proteins
C. To store genetic information
D. To regulate cell growth
Question 9
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. 0.25
B. 0.5
C. 0.75
D. 1
Question 10
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. Site of protein synthesis
B. Site of lipid synthesis
C. Site of starch synthesis
D. Site of cellulose synthesis
Question 11
In the process of mitosis, what is the primary function of the spindle fibers?
A. To separate chromosomes
B. To align chromosomes
C. To attach chromosomes to the spindle pole
D. To regulate cell growth
Question 12
In the context of growth and regulation, what is the primary mechanism by which cells grow and divide?
A. Mitosis
B. Meiosis
C. Apoptosis
D. Differentiation
Question 13
A diagram of the human circulatory system is shown below. What is the primary function of the coronary arteries?
A. Transport of oxygenated blood to the heart
B. Transport of deoxygenated blood from the heart
C. Regulation of heart rate
D. Maintenance of blood pressure
Question 14
Which of the following is a characteristic of a prokaryotic cell?
A. Presence of a true nucleus
B. Presence of mitochondria
C. Lack of a true nucleus
D. Presence of a cell wall
Question 15
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?
A. The cell will shrink due to water loss.
B. The cell will swell due to water uptake.
C. The cell will remain unchanged.
D. The cell will burst due to osmotic pressure.

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