POST UTME DELSU 2021 Biology | Objective

Are you preparing for POST UTME DELSU 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
A study on the epidemio\logy of malaria in a rural community revealed that the prevalence of the disease is highest among individuals with a history of previous exposure to the disease. Which of the following best explains this observation?
A. Herd immunity
Correct B. Antibody-dep\endent enhancement
C. Antigenic variation
D. Cross-reactivity

Correct Answer: B

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Question 2
A diagram of the human eye is shown below. Which of the following structures is responsible for the accommodation of light?
A. Cornea
B. Iris
C. Retina
Correct D. Lens

Correct Answer: D

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Question 3
A researcher is studying the effect of pH on the growth of E. coli. Which of the following best describes the relationship between pH and bacterial growth?
A. pH has a direct linear relationship with bacterial growth
B. pH has an inverse linear relationship with bacterial growth
Correct C. pH has a quadratic relationship with bacterial growth
D. pH has no effect on bacterial growth

Correct Answer: C

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Question 4
A diagram of the human brain is shown below. Which of the following structures is responsible for the regulation of body temperature?
A. Cerebrum
B. Cerebellum
C. Brainstem
Correct D. Hypothalamus

Correct Answer: D

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Question 5
A researcher is studying the effect of antibiotics on the growth of bacteria. Which of the following best describes the mechanism of action of penicillin?
Correct A. Inhibition of cell wall synthesis
B. Inhibition of protein synthesis
C. Inhibition of DNA replication
D. Inhibition of RNA transcription

Correct Answer: A

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Question 6
In a plant cell, the process of osmoregulation is primarily facilitated by the movement of water molecules across the plasma membrane through which of the following transport mechanisms?
A. Passive diffusion
B. Facilitated diffusion
C. Active transport
Correct D. Osmosis

Correct Answer: D

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Question 7
A diagram of the human respiratory system is shown below. Which of the following structures is responsible for the exchange of oxygen and carbon dioxide?
A. Trachea
Correct B. Lungs
C. Diaphragm
D. Bronchi

Correct Answer: B

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Question 8
In a typical animal cell, the process of cell division is initiated by the replication of which of the following structures?
A. Mitochondria
B. Endoplasmic reticulum
Correct C. Nucleus
D. Golgi apparatus

Correct Answer: C

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Question 9
A diagram of the human circulatory system is shown below. Which of the following structures is responsible for the transport of oxygenated blood from the lungs to the rest of the body?
Correct A. Aorta
B. Pulmonary artery
C. Pulmonary vein
D. Coronary artery

Correct Answer: A

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Question 10
In a typical plant cell, the process of photosynthesis occurs in which of the following organelles?
A. Mitochondria
Correct B. Chloroplast
C. Endoplasmic reticulum
D. Golgi apparatus

Correct Answer: B

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Question 11
In a population of 1000 individuals, 70% are homozygous dominant (BB), 20% are heterozygous (Bb), and 10% are homozygous recessive (bb). What is the probability that two individuals chosen at random will have offspring with the BB genotype?
Correct A. 0.35
B. 0.45
C. 0.55
D. 0.65

Correct Answer: A

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Question 12
A researcher is studying the effect of pH on the growth of E. coli. The researcher measures the growth rate of E. coli at different pH levels and plots the data on a graph. Which of the following types of graphs would best represent the data?
A. Line graph
B. Bar graph
Correct C. Scatter plot
D. Histogram

Correct Answer: C

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Question 13
A cell is placed in a solution with a concentration of 0.1 M glu\cose. The cell has a permeability coefficient of 1.5 x 10^-6 cm/s. What is the rate of glu\cose uptake by the cell?
Correct A. 1.5 x 10^-5 mol/cm^2/s
B. 1.5 x 10^-6 mol/cm^2/s
C. 1.5 x 10^-7 mol/cm^2/s
D. 1.5 x 10^-8 mol/cm^2/s

Correct Answer: A

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Question 14
A population of rabbits is growing at a rate of 20% per year. If the initial population is 100 rabbits, what will be the population after 5 years?
Correct A. 1638
B. 1648
C. 1658
D. 1668

Correct Answer: A

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Question 15
A researcher is studying the effect of temperature on the rate of a chemical reaction. The researcher measures the rate of the reaction at different temperatures and plots the data on a graph. Which of the following types of graphs would best represent the data?
A. Line graph
B. Bar graph
Correct C. Scatter plot
D. Histogram

Correct Answer: C

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Question 16
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
Correct A. 0.36
B. 0.64
C. 0.16
D. 0.04

Correct Answer: A

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Question 17
A researcher isolates a bacterium that exhibits antibiotic resis\tance. The bacterium's DNA is analyzed, and a mutation is found in the gene encoding the target protein of the antibiotic. Which of the following best describes the type of mutation?
Correct A. Point mutation
B. Frameshift mutation
C. Deletion
D. Insertion

Correct Answer: A

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Question 18
A cell is placed in a hypotonic solution. What will happen to the cell?
A. The cell will shrink
Correct B. The cell will swell
C. The cell will remain unchanged
D. The cell will burst

Correct Answer: B

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Question 19
A plant is placed in a greenhouse with a temperature of 25°C and a relative humidity of 60%. What is the expected rate of transpiration?
A. High
Correct B. Medium
C. Low
D. Very low

Correct Answer: B

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Question 20
A species of bird has a beak length of 5 cm. If the beak length is increased by 10% every generation, what will be the beak length of the bird's great-great-grandchild?
A. 7.5 cm
B. 8.5 cm
Correct C. 9.5 cm
D. 10.5 cm

Correct Answer: C

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Question 21
In a eukaryotic cell, what is the primary function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
C. Lipid synthesis
Correct D. Protein modification

Correct Answer: D

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Question 22
What is the process by which plants convert light energy into chemical energy?
A. Respiration
Correct B. Photosynthesis
C. Decomposition
D. Fermentation

Correct Answer: B

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Question 23
What is the term for the movement of molecules from an area of high concentration to an area of low concentration?
A. Osmosis
Correct B. Diffusion
C. Active transport
D. Passive transport

Correct Answer: B

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Question 24
What is the term for the process by which cells divide to produce two daughter cells?
Correct A. Mitosis
B. Meiosis
C. Binary fission
D. Endoreduplication

Correct Answer: A

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Question 25
What is the term for the process by which cells become specialized to perform specific functions?
Correct A. Differentiation
B. Mitosis
C. Meiosis
D. Apoptosis

Correct Answer: A

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