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POST UTME GREENFIELD UNIVERSITY 2021 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 2021 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1

In the context of classification of living things, which of the following kingdoms is characterized by the presence of cell walls made of chitin?

A. Animalia

Correct B. Fungi

C. Protista

D. Monera

Correct Answer: B

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Question 2

A patient with a malfunctioning kidney is experiencing water retention. Which of the following organs will be affected by the malfunction?

A. Liver

B. Pancreas

Correct C. Kidney

D. Heart

Correct Answer: C

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Question 3

A diagram of a neuron is shown below. Which of the following parts of the neuron is responsible for transmitting signals to other neurons?

A. D\endrite

Correct B. Axon

C. Cell Body

D. Myelin Sheath

Correct Answer: B

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Question 4

A diagram of the human eye is shown below. 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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Question 5

A diagram of a plant cell is shown below. Which of the following parts of the cell is responsible for photosynthesis?

A. Cell Wall

Correct B. Chloroplast

C. Vacuole

D. Mitochondria

Correct Answer: B

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Question 6

In a photosynthetic pathway, which of the following is the primary acceptor of electrons in the light-dep\endent reactions?

A. P680

Correct B. P700

C. Ferredoxin

D. Plastocyanin

Correct Answer: B

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Question 7

In the context of excretion, what is the primary function of the kidneys?

A. Regulation of blood pressure

B. Maintenance of acid-base balance

Correct C. Removal of waste products

D. Production of hormones

Correct Answer: C

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Question 8

According to the theory of evolution, what is the primary mechanism driving speciation?

A. Mutation

B. Gene flow

C. Genetic drift

Correct D. Natural selection

Correct Answer: D

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Question 9

In the context of respiration, what is the primary function of the mitochondria?

Correct A. Production of ATP

B. Regulation of blood pressure

C. Removal of waste products

D. Production of hormones

Correct Answer: A

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Question 10

According to the classification of living things, what is the primary characteristic that distinguishes prokaryotes from eukaryotes?

Correct A. Presence of a nucleus

B. Presence of mitochondria

C. Presence of a cell wall

D. Size of the cell

Correct Answer: A

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Question 11

The diagram below shows the structure of a bacterial cell. Which of the following organelles is responsible for protein synthesis?

Correct A. Ribosome

B. Mitochondria

C. Nucleus

D. Cytoplasm

Correct Answer: A

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Question 12

A population of bacteria is growing exponentially. If the initial population is 100 and the growth rate is 20% per hour, what will be the population after 3 hours?

A. 300

B. 400

Correct C. 500

D. 600

Correct Answer: C

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Question 13

The diagram below shows the structure of a plant cell. Which of the following organelles is responsible for photosynthesis?

Correct A. Chloroplast

B. Mitochondria

C. Nucleus

D. Cytoplasm

Correct Answer: A

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Question 14

A gene has two alleles, A and a. If the frequency of allele A is 0.6 and the frequency of allele a is 0.4, what is the expected genotype of the offspring?

A. AA

B. Aa

C. aa

Correct D. Both AA and aa

Correct Answer: D

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Question 15

The diagram below shows the structure of a human eye. Which of the following parts is responsible for detecting light?

A. Cornea

B. Iris

Correct C. Retina

D. Lens

Correct Answer: C

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Question 16

In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the Δπαλλουσες (Δπαλλουρ) complex. What is the primary function of the Δπαλλουρ complex in this context?

Correct A. To bind to the centromere and initiate sister chromatid separation

B. To phosphorylate histone H3 and condense chromatin

C. To activate the anaphase-promoting complex (APC)

D. To regulate the spindle checkpoint

Correct Answer: A

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Question 17

A patient presents with symptoms of a bacterial infection, including fever, chills, and a productive cough. The patient's sputum sample is cultured, and the results show the presence of a gram-positive coccus. What is the most likely cause of this patient's symptoms?

Correct A. Staphylococcus aureus

B. Streptococcus pneumoniae

C. Haemophilus influenzae

D. Pseudomonas aeruginosa

Correct Answer: A

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Question 18

A researcher is studying the effects of climate change on a particular e\cosystem. The researcher collects data on the temperature, precipitation, and species composition of the e\cosystem over a period of 10 years. What type of data analysis would be most appropriate for this study?

A. Regression analysis

Correct B. Time-series analysis

C. Cluster analysis

D. Principal component analysis

Correct Answer: B

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Question 19

A plant breeder is developing a new crop variety that is resis\tant to a specific disease. The breeder uses a technique called marker-assisted selection (MAS) to identify the genes responsible for the disease resis\tance. What is the primary advantage of u\sing MAS in this context?

Correct A. Increased accuracy of selection

B. Reduced time and \cost of selection

C. Improved disease resis\tance

D. Increased genetic diversity

Correct Answer: A

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Question 20

A patient presents with symptoms of a viral infection, including fever, headache, and a sore throat. The patient's blood sample is tested for the presence of antibodies against a specific virus. What is the primary function of the antibodies in this context?

Correct A. To neutralize the virus

B. To activate the complement system

C. To mark the virus for destruction

D. To stimulate the immune response

Correct Answer: A

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Question 21

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. 0.16

B. 0.36

C. 0.64

D. 0.84

Correct Answer: A

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Question 22

The diagram below shows the structure of a plant cell. Which part is responsible for photosynthesis?

A. Vacuole

Correct B. Chloroplast

C. Cell wall

D. Cytoplasm

Correct Answer: B

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Question 23

A cell is placed in a solution with a pH of 5. If the cell membrane has a pH-dep\endent permeability, what will happen to the cell?

Correct A. The cell will swell and eventually burst.

B. The cell will shrink and lose water.

C. The cell will remain unchanged.

D. The cell will gain water and swell.

Correct Answer: A

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Question 24

The diagram below shows a cross-section of a root hair cell. What is the function of the root hair?

Correct A. To absorb water and minerals from the soil.

B. To store water and nutrients.

C. To transport sugars and amino acids.

D. To synthesize proteins and lipids.

Correct Answer: A

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Question 25

A solution contains 0.5 M glu\cose and 0.2 M fructose. What is the total molarity of the solution?

A. 0.3 M

B. 0.5 M

Correct C. 0.7 M

D. 0.9 M

Correct Answer: C

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