POST UTME NOUN 2025 Biology | Objective

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 homozygous dominant genotype 'AA'?
A. 0.64
B. 0.36
C. 0.16
D. 0.04
Question 2
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmosis
Question 3
A population of rabbits is growing exponentially. Which of the following is a characteristic of the population growth curve?
A. The population grows at a cons\tant rate
B. The population grows exponentially
C. The population grows linearly
D. The population remains cons\tant
Question 4
A diagram of a simple e\cosystem is shown below. Which of the following is an example of a primary consumer?
A. Herbivore
B. Carnivore
C. Decomposer
D. Producer
Question 5
A diagram of the human nervous system is shown below. Which part of the brain is responsible for controlling voluntary movements?
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal cord
Question 6
A researcher is studying the effect of temperature on the growth of a microorganism. The researcher measures the growth of the microorganism at different temperatures and plots the data on a graph. What type of graph would the researcher most likely use to represent the data?
A. Line graph
B. Bar graph
C. Scatter plot
D. Histogram
Question 7
The process of meiosis results in the production of four haploid cells from a diploid cell. Which of the following is a characteristic of these haploid cells?
A. They have the same number of chromosomes as the parent cell
B. They have half the number of chromosomes as the parent cell
C. They have a different number of chromosomes than the parent cell
D. They are all genetically identical
Question 8
A diagram of a titration setup is shown below. Which of the following is the purpose of the burette?
A. To measure the volume of the acid
B. To measure the volume of the base
C. To mix the acid and base
D. To measure the pH of the solution
Question 9
A population of bacteria is growing exponentially with a growth rate of 0.2 per hour. If the initial population is 1000, calculate the population after 3 hours.
A. 2000
B. 4000
C. 6000
D. 8000
Question 10
In a population of rabbits, what is the term for the rate at which the population increases or decreases?
A. Growth rate
B. Birth rate
C. Death rate
D. Intrinsic rate of increase
Question 11
A patient is diagnosed with a rare genetic disorder that affects the production of a specific enzyme. The patient's enzyme levels are measured and found to be 20% of the normal level. What is the most likely genotype of the patient?
A. Homozygous recessive
B. Homozygous dominant
C. Heterozygous
D. Compound heterozygous
Question 12
The Hardy-Weinberg principle assumes that a population is infinite, randomly mating, and has no mutation or gene flow. Which of the following is a consequence of this principle?
A. The frequency of the dominant allele remains cons\tant from one generation to the next.
B. The frequency of the recessive allele increases over time.
C. The population becomes homozygous for the dominant allele.
D. The population becomes homozygous for the recessive allele.
Question 13
A diagram shows a plant with 5 petals on each flower. If the plant is crossed with a plant that has 3 petals on each flower, what is the probability that the offspring will have 4 petals on each flower?
A. 0.5
B. 0.25
C. 0.75
D. 0.33
Question 14
A 2.5 L flask contains 0.5 M glu\cose solution. If 10 mL of 1 M HCl is added to the solution, what is the new concentration of glu\cose?
A. 0.45 M
B. 0.5 M
C. 0.55 M
D. 0.6 M
Question 15
In a plant cell, what is the primary function of the mitochondria?
A. Photosynthesis
B. Cell signaling
C. Lipid metabolism
D. Cellular respiration

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: