POST UTME DELSU 2023 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 2023 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a forest e\cosystem, the presence of a keystone species can lead to a cascade effect on the entire community. Which of the following is an example of a keystone species?
Correct A. Wolf
B. Grizzly bear
C. Mountain lion
D. Coyote

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
A population of rabbits is growing at a rate of 20% per year. If the initial population is 100, what will be the population after 3 years?
A. 120
B. 140
Correct C. 160
D. 180

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
In a study on the effect of pH on enzyme activity, the following data were collected:
A. pH 7
Correct B. pH 9
C. pH 11
D. pH 13

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A gene has two alleles, A and a. 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 of two heterozygous parents?
A. AA
B. Aa
C. aa
Correct D. Both AA and aa

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A neuron has a resting potential of -70 mV. If it is depolarized to -60 mV, what is the change in membrane potential?
A. +10 mV
Correct B. -10 mV
C. +20 mV
D. -20 mV

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6
In a eukaryotic cell, the process of cellular respiration occurs in which of the following organelles?
Correct A. Mitochondria
B. Chloroplast
C. Nucleus
D. Endoplasmic Reticulum

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
A microorganism is isolated from a patient and identified as Staphylococcus aureus. Which of the following is a characteristic of this bacterium?
A. It is a gram-negative bacterium
Correct B. It is a facultative anaerobe
C. It is a spore-forming bacterium
D. It is a motile bacterium

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
A plant cell is placed in a solution containing 0.1 M glu\cose. Which of the following is the correct representation of the equation for the process that occurs?
A. C6H12O6 + 6O2 → 6CO2 + 6H2O
B. C6H12O6 + 6H2O → 6CO2 + 12H2
C. C6H12O6 → C6H12O6 + 6O2
Correct D. C6H12O6 + 6O2 → 6CO2 + 6H2O

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
A tissue is composed of which of the following types of cells?
A. Squamous epithelial cells
B. Cuboidal epithelial cells
C. Columnar epithelial cells
Correct D. All of the above

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
A diagram of a plant cell is shown below. Which of the following organelles is responsible for photosynthesis?
A. Mitochondria
Correct B. Chloroplast
C. Nucleus
D. Endoplasmic Reticulum

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11
In a population of 1000 individuals, the frequency of the dominant allele is 0.6. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the recessive allele?
Correct A. 0.4
B. 0.2
C. 0.8
D. 0.1

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
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. If the growth rate is highest at pH 7, what can be concluded about the optimal pH for E. coli growth?
Correct A. pH 7 is the optimal pH for E. coli growth
B. pH 7 is the minimum pH for E. coli growth
C. pH 7 is the maximum pH for E. coli growth
D. pH 7 is the neutral pH for E. coli growth

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13
A species of plant has a genetic variation that affects its ability to photosynthesize. If the plant has a 50% chance of inheriting the variation from each parent, what is the probability that the plant will inherit two copies of the variation?
Correct A. 0.25
B. 0.5
C. 0.75
D. 0.9

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14
A researcher is studying the effect of temperature on the growth of a microorganism. The researcher measures the growth rate of the microorganism at different temperatures and plots the data on a graph. If the growth rate is highest at 37°C, what can be concluded about the optimal temperature for the microorganism's growth?
Correct A. 37°C is the optimal temperature for the microorganism's growth
B. 37°C is the minimum temperature for the microorganism's growth
C. 37°C is the maximum temperature for the microorganism's growth
D. 37°C is the neutral temperature for the microorganism's growth

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15
A species of animal has a genetic variation that affects its ability to adapt to its environment. If the animal has a 30% chance of inheriting the variation from each parent, what is the probability that the animal will inherit two copies of the variation?
Correct A. 0.09
B. 0.3
C. 0.6
D. 0.9

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, resulting in the release of histone proteins and the condensation of chromatin into visible chromosomes. Which of the following stages of mitosis is characterized by the alignment of chromosomes at the metaphase plate?
A. Prophase
Correct B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17
The nervous system is responsible for transmitting signals from sensory receptors to the brain, where they are interpreted and processed. Which of the following types of neurons is responsible for transmitting signals from sensory receptors to the spinal cord?
A. Motor neuron
Correct B. Sensory neuron
C. Interneuron
D. Association neuron

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18
The process of photosynthesis in plants involves the conversion of light energy into chemical energy, resulting in the production of glu\cose and oxygen. Which of the following stages of photosynthesis is responsible for the absorption of light energy?
Correct A. Light-dep\endent reactions
B. Light-indep\endent reactions
C. Calvin cycle
D. Photorespiration

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19
The process of mitosis in eukaryotic cells results in the production of two daughter cells that are genetically identical to the parent cell. Which of the following stages of mitosis is characterized by the separation of sister chromatids?
A. Prophase
B. Metaphase
Correct C. Anaphase
D. Telophase

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20
The process of osmoregulation in animals involves the regulation of water and ion balance in the body. Which of the following types of cells is responsible for the reabsorption of water and ions in the kidneys?
Correct A. Proximal convoluted tubule cells
B. Distal convoluted tubule cells
C. Collecting duct cells
D. Loop of Henle cells

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' for black body color is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'B'B?
Correct A. 0.16
B. 0.24
C. 0.36
D. 0.64

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22
A 2.5 g sample of a compound containing only carbon and hydrogen is analyzed by combustion. The amount of carbon dioxide produced is 1.8 g, and the amount of water produced is 0.9 g. What is the empirical formula of the compound?
A. CH4
Correct B. C2H6
C. C3H8
D. C4H10

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23
A diagram of a plant cell is shown below. Identify the part labeled 'X'.
A. Mitochondria
B. Nucleus
C. Vacuole
Correct D. Plastid

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24
A 0.5 M solution of a weak acid HA is prepared by dissolving 0.5 g of the acid in 100 mL of water. What is the pH of the solution?
A. 2.0
Correct B. 2.5
C. 3.0
D. 3.5

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25
A diagram of a simple circuit is shown below. What is the current flowing through the 2 ohm resistor?
Correct A. 0.5 A
B. 1.0 A
C. 1.5 A
D. 2.0 A

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub:
Chat with Support