POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of digestion in the small intestine involves the breakdown of proteins into
A. Carbohydrates
B. Fats
C. Amino acids
D. Nucleotides
Question 2
A researcher is studying the impact of climate change on e\cosystems. Which of the following is an example of a biotic factor that affects the distribution of species?
A. Temperature
B. Humidity
C. Predation
D. Competition for resources
Question 3
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
A. To focus light on the retina
B. To detect movement
C. To regulate pupil size
D. To produce tears
Question 4
The sense organ responsible for detecting changes in light intensity is the?
A. Eye
B. Ear
C. Nose
D. Tongue
Question 5
Which of the following is an example of a biome?
A. A coral reef
B. A desert e\cosystem
C. A tropical rainforest
D. A freshwater lake
Question 6
What is the primary mechanism of gas exchange in plants?
A. Diffusion through the cell membrane
B. Active transport across the stomata
C. Passive transport through the xylem
D. Osmosis through the cuticle
Question 7
The process of photosynthesis in plants involves the conversion of light energy into what form of energy?
A. Chemical energy
B. Thermal energy
C. Electrical energy
D. Kinetic energy
Question 8
A gene is located on the X chromosome. What is the expected effect on the gene's expression if a mutation occurs in the gene?
A. Increased expression
B. Decreased expression
C. No change
D. Variable
Question 9
A neuron is stimulated by an action potential. What is the expected change in the neuron's membrane potential?
A. Depolarization
B. Hyperpolarization
C. No change
D. Variable
Question 10
A bio\logist is studying the structure of a prokaryotic cell. What is the primary function of the cell membrane in prokaryotic cells?
A. To regulate the movement of materials in and out of the cell
B. To provide structural support to the cell
C. To facilitate the exchange of gases between the cell and the environment
D. To store nutrients and water within the cell
Question 11
A researcher is studying the evolution of a particular species of bird. Which of the following is an example of a convergent evolution?
A. The development of wings in birds and insects
B. The evolution of the eye in different species
C. The adaptation of the human nose to breathe in cold climates
D. The development of the human brain to process complex information
Question 12
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 0.2 per hour, what is the population size after 5 hours?
A. 1000
B. 2000
C. 5000
D. 10000
Question 13
In the xylem, what is the primary function of the tracheids?
A. Transport of water and minerals from roots to leaves
B. Production of ethylene gas for plant growth
C. Storage of starch and other nutrients
D. Regulation of stomatal opening and clo\sing
Question 14
The diagram below shows a cross-section of a plant root. Identify the part labeled A.
A. Root hair
B. Epidermis
C. Cortex
D. Stele
Question 15
The diagram below shows a simple circuit. Identify the part labeled A.
A. Resistor
B. Capacitor
C. Inductor
D. Battery

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