POST UTME GREENFIELD UNIVERSITY 2019 Biology | Objective

Are you preparing for POST UTME GREENFIELD UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2019 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 is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?
Correct A. 0.8
B. 0.6
C. 0.4
D. 0.2

Correct Answer: A

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Question 2
A diagram of the human brain is shown below. Which part of the brain is responsible for controlling voluntary movements?
Correct A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal Cord

Correct Answer: A

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Question 3
A solution of glu\cose is prepared by dissolving 20g of glu\cose in 100g of water. What is the concentration of the solution in g/dL?
A. 10g/dL
Correct B. 20g/dL
C. 30g/dL
D. 40g/dL

Correct Answer: B

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Question 4
A diagram of the human heart is shown below. Which part of the heart pumps blood to the lungs?
Correct A. Right Ventricle
B. Left Ventricle
C. Right Atrium
D. Left Atrium

Correct Answer: A

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Question 5
A population of bacteria is growing exponentially. If the initial population is 100 and the population doubles every 2 hours, what is the population after 6 hours?
A. 1600
B. 3200
Correct C. 6400
D. 12800

Correct Answer: C

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Question 6
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'?
Correct A. 0.36
B. 0.64
C. 0.72
D. 0.84

Correct Answer: A

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Question 7
A 2.5-mL sample of a 0.1-M solution of NaOH is titrated with 0.1 M HCl. What is the pH of the solution after the addition of 2.5 mL of HCl?
A. 1
Correct B. 2
C. 3
D. 4

Correct Answer: B

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Question 8
A plant grows in a pot with a mixture of soil and sand. The plant's roots grow deeper into the soil, and the plant's leaves grow towards the light. What is the name of the process by which the plant grows towards the light?
Correct A. Phototropism
B. Geotropism
C. Hydrotropism
D. Thigmotropism

Correct Answer: A

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Question 9
A 10-mL sample of a 0.5-M solution of HCl is mixed with 10 mL of a 0.5-M solution of NaOH. What is the pH of the resulting solution?
A. 1
Correct B. 2
C. 3
D. 4

Correct Answer: B

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Question 10
A population of rabbits is growing at a rate of 20% per year. If the population is currently 1000, what will be the population after 5 years?
A. 1638
B. 2000
Correct C. 2430
D. 3000

Correct Answer: C

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Question 11
The xylem tissue in plants is responsible for transporting water and minerals from the roots to the leaves. Which of the following is a characteristic of xylem tissue?
A. It contains sieve cells
Correct B. It contains tracheids
C. It contains xylem parenchyma
D. It contains phloem tissue

Correct Answer: B

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Question 12
The Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation if certain conditions are met. Which of the following is NOT one of the conditions?
A. Random mating
B. No mutation
C. No gene flow
Correct D. No natural selection

Correct Answer: D

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Question 13
The process of evolution can be described as a change in the frequency of alleles in a population over time. Which of the following is an example of a mechanism of evolution?
A. Genetic drift
B. Mutation
C. Gene flow
Correct D. Natural selection

Correct Answer: D

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Question 14
The growth of a plant can be described as a series of stages, including germination, seedling establishment, and maturation. Which of the following is a characteristic of the seedling establishment stage?
Correct A. The seedling develops its first set of leaves
B. The seedling develops its root system
C. The seedling develops its stem
D. The seedling develops its flowers

Correct Answer: A

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Question 15
The human body is composed of various systems, including the circulatory, respiratory, and nervous systems. Which of the following is a function of the circulatory system?
A. To transport oxygen to the lungs
Correct B. To transport nutrients to the cells
C. To transport waste products away from the cells
D. To regulate body temperature

Correct Answer: B

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Question 16
In a tropical rainforest e\cosystem, what is the primary mechanism by which nutrients are cycled from dead organisms to living ones?
Correct A. Decomposition by detritivores
B. Nutrient uptake by plants
C. Nutrient release through weathering
D. Nutrient cycling through symbiotic relationships

Correct Answer: A

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Question 17
A plant cell has a cell wall composed of cellulose. What is the primary function of the cell wall?
Correct A. To provide structural support
B. To regulate water uptake
C. To facilitate cell division
D. To control nutrient uptake

Correct Answer: A

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Question 18
In a xylem vessel, what is the primary mechanism by which water is transported from the roots to the leaves?
Correct A. Transpiration pull
B. Root pressure
C. Capillary action
D. Osmosis

Correct Answer: A

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Question 19
A neuron has a resting membrane potential of -70mV. What is the primary mechanism by which the neuron becomes depolarized?
Correct A. Influx of sodium ions
B. Efflux of potassium ions
C. Influx of chloride ions
D. Efflux of sodium ions

Correct Answer: A

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Question 20
A cell is in the G2 phase of the cell cycle. What is the primary function of the cell during this phase?
A. DNA replication
Correct B. Cell division
C. Cell growth
D. Cell differentiation

Correct Answer: B

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Question 21
The diagram below represents the structure of a bacterial cell. Which of the following organelles is responsible for protein synthesis?
A. Mitochondria
Correct B. Ribosome
C. Lysosome
D. Peroxisome

Correct Answer: B

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Question 22
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following stages of cellular respiration is responsible for the production of NADH?
A. Glycolysis
Correct B. Citric Acid Cycle
C. Electron Transport Chain
D. Fermentation

Correct Answer: B

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Question 23
The diagram below represents the structure of a plant cell. Which of the following organelles is responsible for photosynthesis?
A. Mitochondria
Correct B. Chloroplast
C. Lysosome
D. Peroxisome

Correct Answer: B

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Question 24
The process of mitosis involves the division of a cell into two daughter cells. Which of the following stages of mitosis is responsible for the separation of chromosomes?
A. Prophase
B. Metaphase
Correct C. Anaphase
D. Telophase

Correct Answer: C

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Question 25
The diagram below represents the structure of a human eye. Which of the following parts of the eye is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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