POST UTME WELLSPRING UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A researcher is studying the effects of pH on enzyme activity. Which of the following enzymes is most likely to be affected by a change in pH?
A. Lactase
B. Amylase
C. Tryp\sin
D. Pep\sin
Question 2
A researcher is studying the effects of a new antibiotic on a bacterial population. The researcher observes that the bacteria are resis\tant to the antibiotic due to a mutation in the bacterial genome. What type of selection pressure is acting on the bacterial population?
A. Natural selection
B. Artificial selection
C. Genetic drift
D. Gene flow
Question 3
A 5.0-liter solution contains 2.0 liters of ethanol and 3.0 liters of water. What is the mole \fraction of ethanol in the solution?
A. 0.4
B. 0.5
C. 0.6
D. 0.7
Question 4
A 2.5 cm long xylem vessel has a diameter of 0.5 mm. If the vessel is filled with water, what is the volume of water in cubic centimeters?
A. 0.125
B. 0.25
C. 0.5
D. 1
Question 5
The process by which an organism's genetic information is passed from one generation to the next is called what?
A. Mutation
B. Genetic drift
C. Gene flow
D. Heritability
Question 6
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmosis
Question 7
The process by which water moves through a plant, from the roots to the leaves, is known as
A. transpiration
B. translocation
C. osmosis
D. diffusion
Question 8
A diagram of a human digestive system is shown below. What is the function of the structure labeled 'B'?
A. Absorption of nutrients
B. Digestion of proteins
C. Storage of water
D. Excretion of waste
Question 9
A plant with the genotype RrSs produces 75% red flowers and 25% white flowers. What is the genotype of the individual that produces only red flowers?
A. RRSS
B. RrSs
C. RrSS
D. rrss
Question 10
A diagram shows a plant with 5 petals and 10 sepals. What is the name of the plant?
A. Rose
B. Lily
C. Tulip
D. Daisy
Question 11
A diagram shows a neuron with a d\endrite, cell body, and axon. What is the function of the d\endrite?
A. To receive signals from other neurons
B. To transmit signals to other neurons
C. To synthesize neurotransmitters
D. To regulate muscle contraction
Question 12
In the context of photosynthesis, what is the primary function of the light-dep\endent reactions?
A. To produce ATP and NADPH
B. To produce glu\cose and oxygen
C. To reduce CO2 to glu\cose
D. To oxidize water to oxygen
Question 13
The theory that explains how species adapt to their environments over time is known as
A. natural selection
B. genetic drift
C. mutation
D. gene flow
Question 14
A species of bird is migrating from its breeding grounds to its wintering grounds. Which of the following types of migration is most likely to occur?
A. Altitudinal migration
B. Latitudinal migration
C. Longitudinal migration
D. Diurnal migration
Question 15
The hormone responsible for regulating the growth and development of plants is
A. auxin
B. gibberellin
C. ethylene
D. abscisic acid

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