POST UTME VERITAS UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 5 L solution of 0.5 M glu\cose is diluted to 10 L. What is the new concentration of glu\cose?
A. 0.1 M
B. 0.2 M
C. 0.25 M
D. 0.5 M
Question 2
The human eye has a unique structure that allows it to detect light and color. Which of the following is a characteristic of the human eye's photoreceptors?
A. They are sensitive to only one type of light
B. They are sensitive to a wide range of light frequencies
C. They are responsible for transmitting visual signals to the brain
D. They are responsible for regulating the eye's focus
Question 3
A 2-year-old child is diagnosed with a rare genetic disorder that affects the production of a specific enzyme. The child's parents are both carriers of the recessive allele. What is the probability that their next child will be affected by the disorder?
A. 0.25
B. 0.50
C. 0.75
D. 0.90
Question 4
A cell undergoes mitosis, resulting in two daughter cells. Which of the following statements is correct about the daughter cells?
A. The daughter cells have the same number of chromosomes as the parent cell.
B. The daughter cells have half the number of chromosomes as the parent cell.
C. The daughter cells have twice the number of chromosomes as the parent cell.
D. The daughter cells have a different number of chromosomes than the parent cell.
Question 5
In a closed e\cosystem, what is the net effect of the decomposition of organic matter on the nutrient cycle?
A. Increase in nutrient availability
B. Decrease in nutrient availability
C. No effect on nutrient availability
D. Increase in nutrient immobilization
Question 6
In a population of 1000 bacteria, 80% are in the exponential growth phase. If the growth rate is 2% per hour, how many bacteria will be in the exponential growth phase after 5 hours?
A. 800
B. 900
C. 1000
D. 1200
Question 7
In a human body, what is the primary function of the xylem in the vascular system?
A. Transport of oxygen and nutrients
B. Transport of carbon dioxide and waste
C. Production of hormones
D. Regulation of body temperature
Question 8
A cell in interphase has a DNA content of 2C. If the cell enters mitosis and undergoes one round of DNA replication, what will be the DNA content of the daughter cells?
A. 2C
B. 4C
C. 8C
D. 16C
Question 9
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
B. To produce NADH and FADH2 from the citric acid cycle
C. To pump protons across the mitochondrial membrane, creating a proton gradient
D. To convert glu\cose into pyruvate through glycolysis
Question 10
A population of Drosophila melanogaster is being studied for its genetic variation. Which of the following genetic traits is an example of a polygenic trait?
A. Eye color
B. Wing length
C. Body color
D. Eye shape
Question 11
A plant has a circadian rhythm that regulates its photosynthetic activity. The rhythm is controlled by a specific gene that codes for a protein that regulates the expression of other genes involved in photosynthesis. If the gene is mutated, what is the likely effect on the plant's photosynthetic activity?
A. Increased photosynthetic activity
B. Decreased photosynthetic activity
C. No effect on photosynthetic activity
D. Increased growth rate
Question 12
A plant has a xylem sap concentration of 10% glu\cose. If 100 mL of sap is collected, what is the mass of glu\cose in grams?
A. 10g
B. 20g
C. 30g
D. 40g
Question 13
A respiratory system is responsible for exchanging gases between the environment and the body. Which of the following is an example of a respiratory system?
A. The human respiratory system.
B. The plant respiratory system.
C. The animal respiratory system.
D. The insect respiratory system.
Question 14
The diagram below represents a cross-section of the human eye. Which part of the eye is responsible for adjusting the size of the pupil?
A. A
B. B
C. C
D. D
Question 15
The process by which plants absorb water and minerals from the soil is known as?
A. Transpiration
B. Osmosis
C. Diffusion
D. Active transport

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