POST UTME OAU 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 2
The process of digestion in the human body involves the breakdown of food into smaller molecules that can be absorbed and utilized by the body. Which of the following enzymes is responsible for the breakdown of carbohydrates in the small intestine?
A. Amylase
B. Lactase
C. Tryp\sin
D. Lipase
Question 3
A cell is placed in a solution with a high concentration of salt. 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 undergo mitosis.
Question 4
The process of mitosis in eukaryotic cells involves the replication of DNA and the subsequent separation of chromosomes into two daughter cells. Which of the following stages of mitosis is characterized by the condensation of chromosomes?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 5
A plant cell has a cell wall, chloroplasts, and a large vacuole. What is the primary function of the cell wall?
A. To provide structural support to the cell
B. To regulate the movement of materials in and out of the cell
C. To produce energy for the cell
D. To synthesize proteins
Question 6
A diagram of a plant's xylem and phloem tissues is shown below. Which of the following statements is true regarding the transport of water and nutrients in this plant?
A. Water and nutrients are transported through the xylem and phloem, respectively.
B. Water and nutrients are transported through the phloem and xylem, respectively.
C. Water is transported through the xylem, while nutrients are transported through the phloem.
D. Water and nutrients are transported through both the xylem and phloem.
Question 7
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 dominant allele 'R'?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 8
A diagram shows a plant with a long stem and large leaves. What is the most likely reason for this plant's growth?
A. Insufficient light
B. Excessive water
C. Optimal temperature
D. Adequate nutrients
Question 9
A microorganism is said to be anaerobic if it can survive and grow in the absence of oxygen. What is the primary source of energy for anaerobic microorganisms?
A. Glu\cose
B. Glycolysis
C. Fermentation
D. Respiration
Question 10
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 20% per hour, what will be the population size after 3 hours?
A. 1600
B. 1800
C. 2000
D. 2200
Question 11
A diagram of a human cell is shown below. Which of the following statements is true regarding the structure of the cell?
A. The cell has a nucleus and mitochondria.
B. The cell has a nucleus but no mitochondria.
C. The cell has no nucleus but has mitochondria.
D. The cell has no nucleus or mitochondria.
Question 12
Which of the following tissues is primarily responsible for the production of digestive enzymes in the small intestine?
A. Stratified squamous epithelium
B. Simple columnar epithelium
C. Stratified cuboidal epithelium
D. Simple cuboidal epithelium
Question 13
In the context of evolutionary theories, what is the primary mechanism by which natural selection acts on populations?
A. Genetic drift
B. Gene flow
C. Mutation
D. Natural selection
Question 14
The Hardy-Weinberg principle states that genetic variation in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a condition necessary for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
D. All of the above
Question 15
A researcher is studying the effects of exercise on muscle growth and regulation. Which of the following statements is true regarding the role of myostatin in muscle hypertrophy?
A. Myostatin inhibits muscle growth by suppres\sing the expression of muscle-specific genes
B. Myostatin promotes muscle growth by increa\sing the production of muscle proteins
C. Myostatin has no effect on muscle growth or regulation
D. Myostatin is a growth factor that stimulates muscle hypertrophy

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: