POST UTME WELLSPRING UNIVERSITY 2017 Biology | Objective

Are you preparing for POST UTME WELLSPRING UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2017 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
Correct A. 200
B. 400
C. 600
D. 800

Correct Answer: A

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Question 2
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Mitochondria
B. Chloroplast
C. Vacuole
Correct D. Nucleus

Correct Answer: D

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Question 3
A 2.5-liter solution contains 1.8 liters of ethanol and 0.7 liters of water. What is the mole \fraction of ethanol?
A. 0.72
Correct B. 0.80
C. 0.88
D. 0.96

Correct Answer: B

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Question 4
A diagram of a human eye is shown below. Identify the part labeled 'B'.
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 5
A 0.5-molar solution of HCl is mixed with a 0.2-molar solution of NaOH. What is the resulting pH?
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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Question 6
In the context of evolutionary theories, what is the primary mechanism by which natural selection acts on genetic variation?
A. Genetic drift
B. Gene flow
C. Mutation
Correct D. Differential reproduction

Correct Answer: D

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Question 7
A diagram of the xylem and phloem tissues in a plant is shown below. What is the primary function of the xylem?
Correct A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Support and storage
D. Protection from pathogens

Correct Answer: A

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Question 8
In the process of cellular respiration, what is the primary function of the mitochondria?
Correct A. Synthesis of ATP
B. Breakdown of glu\cose
C. Transport of ions
D. Regulation of cell growth

Correct Answer: A

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Question 9
A diagram of the human circulatory system is shown below. What is the primary function of the heart?
A. Pumping blood to the lungs
B. Pumping blood to the brain
Correct C. Pumping blood to the muscles
D. Regulation of blood pressure

Correct Answer: C

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Question 10
In the context of cell structure, what is the primary function of the nucleus?
A. Synthesis of proteins
Correct B. Storage of genetic information
C. Regulation of cell growth
D. Transport of ions

Correct Answer: B

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Question 11
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
Correct D. No natural selection

Correct Answer: D

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Question 12
A cell in the G2 phase of the cell cycle has a DNA content of 8C. What is the name of the stage in the cell cycle that precedes the G2 phase?
A. G1
Correct B. S
C. G2
D. M

Correct Answer: B

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Question 13
A population of 1000 individuals has a mean height of 170 cm and a s\tandard deviation of 10 cm. If a sample of 50 individuals is randomly selected from this population, what is the probability that the sample mean height will be greater than 175 cm?
Correct A. 0.0563
B. 0.0572
C. 0.0581
D. 0.0590

Correct Answer: A

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Question 14
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmosis

Correct Answer: A

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Question 15
A diagram of a simple food chain is shown below. What is the role of the producer in this e\cosystem?
A. Primary consumer
B. Secondary consumer
C. Decomposer
Correct D. Producer

Correct Answer: D

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Question 16
In asexual reproduction, what is the primary mechanism by which genetic variation is introduced?
A. Mutation
Correct B. Genetic recombination
C. Gene duplication
D. Gene deletion

Correct Answer: B

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Question 17
What is the primary function of the Golgi apparatus in eukaryotic cells?
A. Protein synthesis
B. Lipid synthesis
C. Cell signaling
Correct D. Protein modification

Correct Answer: D

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Question 18
In the context of eco\logical succession, what is the term for the process by which a community of organisms becomes more complex and diverse over time?
A. Primary succession
Correct B. Secondary succession
C. Eco\logical climax
D. Eco\logical stability

Correct Answer: B

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Question 19
What is the primary mechanism by which the nervous system coordinates the body's response to a stimulus?
A. Synaptic transmission
B. Neurotransmitter release
Correct C. Action potential propagation
D. Muscle contraction

Correct Answer: C

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Question 20
What is the term for the process by which microorganisms, such as bacteria, become resis\tant to antibiotics?
Correct A. Antibiotic resis\tance
B. Antibiotic sensitivity
C. Bacterial mutation
D. Bacterial transformation

Correct Answer: A

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