POST UTME OAU 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a certain species of plant, the ratio of the number of chloroplasts to the number of mitochondria is 3:2. If the plant has 120 chloroplasts, how many mitochondria does it have?
A. 80
B. 100
C. 120
D. 140
Question 2
A diagram of a chemical reaction is shown below. Identify the type of reaction.
A. Synthesis reaction
B. Decomposition reaction
C. Replacement reaction
D. Combination reaction
Question 3
A researcher is studying the genetic basis of a disease that affects a specific population. Which of the following genetic principles would be most relevant to this study?
A. The Hardy-Weinberg principle
B. The concept of genetic drift
C. The principle of natural selection
D. The concept of gene flow
Question 4
A population of 1000 individuals is growing at a rate of 5% per year. If the initial population is 500 individuals, what will be the population after 10 years?
A. 1000
B. 1500
C. 2000
D. 2500
Question 5
A 2.5 L flask contains 0.5 M HCl. If 1.5 L of this solution is removed and replaced with 1.5 L of 0.5 M NaOH, what is the resulting concentration of HCl?
A. 0.25 M
B. 0.5 M
C. 0.75 M
D. 1.0 M
Question 6
A 5 kg block of wood is placed on a frictionless surface and a force of 10 N is applied to it. If the block starts from rest, what will be its velocity after 2 seconds?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 7
A diagram of a human eye is shown below. What is the function of the structure labeled 'Y'?
A. Detects light
B. Focuses light
C. Transmits visual signals
D. Regulates pupil size
Question 8
A 2.5% solution of sodium chloride in water has a density of 1.025 g/mL. If 500 mL of this solution is diluted to 2000 mL, what is the concentration of sodium chloride in the final solution?
A. 1.25%
B. 1.875%
C. 2.5%
D. 3.125%
Question 9
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells is known as
A. Mitosis
B. Meiosis
C. Binary Fission
D. Endoreduplication
Question 10
The process by which the kidneys remove waste products from the blood is known as
A. Filtration
B. Reabsorption
C. Secretion
D. Osmosis
Question 11
In the context of respiratory physio\logy, what is the primary function of the parasympathetic nervous system in regulating breathing rate?
A. To increase the rate of breathing
B. To decrease the rate of breathing
C. To regulate the depth of breathing
D. To control the rate of gas exchange
Question 12
The process by which plants convert light energy into chemical energy is known as
A. Respiration
B. Photosynthesis
C. Transpiration
D. Translocation
Question 13
A plant cell is placed in a solution with a high concentration of salt. What happens to the cell?
A. The cell will swell and eventually burst.
B. The cell will shrink and lose water.
C. The cell will remain unchanged.
D. The cell will grow and divide.
Question 14
A cell is placed in a solution of 0.1 M glu\cose and 0.2 M fructose. If the cell membrane is selectively permeable to glu\cose but not to fructose, what will be the concentration of glu\cose in the cell after 30 minutes?
A. 0.05 M
B. 0.10 M
C. 0.15 M
D. 0.20 M
Question 15
A diagram of the human eye is shown below. Identify the part labeled 'A'.
A. Cornea
B. Iris
C. Retina
D. Lens

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