POST UTME OSUSTECH 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 1.0 L flask contains 0.5 mol of an ideal gas at 27°C. What is the volume of the gas, assuming it behaves like an ideal gas?
A. 2.5 L
B. 1.5 L
C. 0.5 L
D. 0.25 L
Question 2
The biotic factor that affects the population of a species is
A. temperature
B. light
C. predation
D. competition
Question 3
The process of photosynthesis occurs in the
A. roots
B. leaves
C. stems
D. flowers
Question 4
The process of diffusion occurs when there is a
A. high concentration of particles
B. low concentration of particles
C. equal concentration of particles
D. unequal concentration of particles
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. 0.64
B. 0.36
C. 0.16
D. 0.84
Question 6
The hormone responsible for regulating the body's water balance is
A. ADH
B. Insulin
C. Thyroid Hormone
D. Growth Hormone
Question 7
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
A. To produce xylem sap
B. To store water and minerals
C. To transport xylem sap
D. To regulate xylem sap flow
Question 8
A patient is experiencing symptoms of a visual disorder characterized by blurred vision and sensitivity to light. Which of the following is the most likely cause of his condition?
A. Cataract
B. Glaucoma
C. Macular degeneration
D. Diabetic retinopathy
Question 9
The main function of the excretory system is to remove
A. waste products
B. excess water
C. excess salts
D. all of the above
Question 10
The process by which an organism's genetic information is passed from one generation to the next is known as
A. Heritability
B. Evolution
C. Mutation
D. Genetic Drift
Question 11
A 50 kg person is s\tanding on a scale in a lift. If the lift is accelerating upwards at 2 m s^-2, what is the reading on the scale?
A. 500 N
B. 550 N
C. 600 N
D. 650 N
Question 12
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?
A. The cell will swell and burst
B. The cell will shrink and die
C. The cell will remain unchanged
D. The cell will grow and divide
Question 13
In the xylem, water and minerals are transported from the roots to the leaves through the process of
A. osmosis
B. active transport
C. transpiration pull
D. diffusion
Question 14
The process by which cells become specialized to perform specific functions is called
A. mitosis
B. meiosis
C. differentiation
D. mutation
Question 15
A patient is experiencing symptoms of a neuro\logical disorder characterized by involuntary muscle contractions and spasms. Which of the following is the most likely cause of his condition?
A. Multiple sclerosis
B. Amyotrophic lateral sclerosis
C. Huntington's disease
D. Parkinson's disease

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