POST UTME GREENFIELD UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of cell division involves the replication of DNA and the separation of chromosomes. What is the primary function of the centrioles in this process?
A. To replicate DNA
B. To separate chromosomes
C. To form the spindle fibers
D. To regulate cell growth
Question 2
A 5-year-old child is diagnosed with a rare genetic disorder that affects the production of a specific enzyme. Which of the following is a possible consequence of this disorder?
A. Increased risk of cancer
B. Impaired immune function
C. Developmental delays
D. Cardiovascular disease
Question 3
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?
A. Staphylococcus aureus
B. Streptococcus pneumoniae
C. Haemophilus influenzae
D. Pseudomonas aeruginosa
Question 4
According to the classification of living things, what is the primary characteristic that distinguishes prokaryotes from eukaryotes?
A. Presence of a nucleus
B. Presence of mitochondria
C. Presence of a cell wall
D. Size of the cell
Question 5
The diagram below shows a cross-section of a root hair cell. What is the function of the root hair?
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.
Question 6
According to the theory of evolution, what is the primary mechanism driving speciation?
A. Mutation
B. Gene flow
C. Genetic drift
D. Natural selection
Question 7
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'?
A. 0.16
B. 0.36
C. 0.64
D. 0.84
Question 8
A plant cell has a cell wall, a large central vacuole, and a small nucleus. What is the primary function of the cell wall?
A. Support and protection
B. Storage and transport
C. Replication and growth
D. Photosynthesis and respiration
Question 9
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?
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.
Question 10
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
C. Kidney
D. Heart
Question 11
In a photosynthetic pathway, which of the following is the primary acceptor of electrons in the light-dep\endent reactions?
A. P680
B. P700
C. Ferredoxin
D. Plastocyanin
Question 12
A diagram of a plant cell is shown below. Which of the following parts of the cell is responsible for photosynthesis?
A. Cell Wall
B. Chloroplast
C. Vacuole
D. Mitochondria
Question 13
In the classification of living things, what is the primary characteristic that distinguishes between prokaryotic and eukaryotic cells?
A. The presence of a nucleus
B. The absence of a cell wall
C. The presence of mitochondria
D. The absence of ribosomes
Question 14
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
B. Time-series analysis
C. Cluster analysis
D. Principal component analysis
Question 15
The diagram below shows the structure of a plant cell. Which part is responsible for photosynthesis?
A. Vacuole
B. Chloroplast
C. Cell wall
D. Cytoplasm

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