POST UTME UNIBEN 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A cell membrane is composed of a phospholipid bilayer with embedded proteins. Which of the following is a characteristic of the phospholipid bilayer?
A. It is impermeable to water
B. It is impermeable to ions
C. It is selectively permeable
D. It is impermeable to glu\cose
Question 2
The study of the structure, behavior, and evolution of the universe is known as
A. Astronomy
B. Astrophysics
C. Cosmo\logy
D. Geo\logy
Question 3
The process by which an organism's genetic information is passed from one generation to the next is known as
A. Heritability
B. Genetic variation
C. Gene expression
D. Epigenetics
Question 4
A diagram of the human brain is shown below. What is the function of the part labeled 'B'?
A. to control movement
B. to regulate body temperature
C. to process sensory information
D. to store memories
Question 5
The graph below shows the relationship between the concentration of a subs\tance and its rate of diffusion. What is the name of the process represented by the graph?
A. Osmosis
B. Diffusion
C. Active Transport
D. Passive Transport
Question 6
In the context of excretion and osmoregulation, what is the primary function of the kidneys in maintaining homeostasis?
A. To regulate blood pH levels
B. To remove waste products from the body
C. To control the concentration of electrolytes in the blood
D. To regulate blood pressure
Question 7
The study of the structure, behavior, and evolution of the Earth's physical features is known as
A. Geo\logy
B. Meteoro\logy
C. Oceanography
D. Seismo\logy
Question 8
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. 2/3
Question 9
The process by which plants convert light energy into chemical energy is known as
A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmosis
Question 10
A researcher is studying the effects of light intensity on plant growth. Which of the following is a likely outcome of increa\sing light intensity?
A. Increased stomatal density
B. Decreased root growth
C. Increased leaf area
D. Reduced photosynthetic rate
Question 11
A diagram of the human nervous system is shown below. Identify the structure labeled 'D'?
A. Brain
B. Spinal Cord
C. Nerves
D. Sensory Receptors
Question 12
A plant has a photosynthetic rate of 10 μmol CO2/s. If the light intensity is increased by a factor of 2, what is the new photosynthetic rate?
A. 5 μmol CO2/s
B. 10 μmol CO2/s
C. 15 μmol CO2/s
D. 20 μmol CO2/s
Question 13
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. To store water and nutrients
B. To synthesize proteins
C. To store genetic material
D. To regulate cell growth
Question 14
The cell membrane is selectively permeable due to the presence of
A. Lipid bilayer
B. Protein channels
C. Carbohydrate molecules
D. Nucleic acids
Question 15
A diagram of the human circulatory system is shown below. Which part of the circulatory system is responsible for transporting oxygenated blood from the lungs to the heart?
A. Pulmonary Veins
B. Aorta
C. Pulmonary Arteries
D. Coronary Arteries

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