POST UTME UNIOSUN 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a simple e\cosystem is shown below. What is the role of the structure labeled B?
A. to produce energy for the e\cosystem
B. to synthesize nutrients
C. to regulate water flow
D. to maintain soil quality
Question 2
What is the primary mechanism by which the circulatory system regulates blood pressure?
A. Through the regulation of heart rate
B. Through the control of breathing rate
C. Through the exchange of CO2 and O2 in the lungs
D. Through the regulation of blood vessel diameter
Question 3
A diagram of a plant cell is shown below. What is the function of the structure labeled A?
A. to produce energy for the cell
B. to synthesize proteins
C. to store genetic information
D. to regulate cell growth
Question 4
What is the primary mechanism by which the reproductive system regulates the timing of gamete release?
A. Through the regulation of hormone levels
B. Through the control of breathing rate
C. Through the exchange of CO2 and O2 in the lungs
D. Through the regulation of body temperature
Question 5
The xylem and phloem are two types of vascular tissues found in plants. Which of the following is a function of the xylem?
A. Transporting water and minerals from the roots to the leaves
B. Transporting sugars and other organic compounds from the leaves to the roots
C. Supporting the plant's structure
D. Regulating the plant's temperature
Question 6
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 7
In a population of 1000 individuals, 60% are heterozygous for the gene controlling the production of the enzyme lactase. If 20% of the population is homozygous recessive for this gene, what is the frequency of the dominant allele?
A. 0.40
B. 0.45
C. 0.50
D. 0.55
Question 8
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. To regulate body temperature
B. To control appetite and satiety
C. To stimulate the release of hormones from the pituitary gland
D. To regulate sleep-wake cycles
Question 9
A 2-year-old child is diagnosed with a rare genetic disorder that affects the production of the enzyme glu\cose-6-phosphatase. Which of the following symptoms is most likely to be associated with this disorder?
A. Hypoglycemia
B. Hyperglycemia
C. Growth retardation
D. Developmental delay
Question 10
A person has a blood type of AB. If the person's genotype is AB, what is the probability that their offspring will have blood type O?
A. 0
B. 0.25
C. 0.5
D. 1
Question 11
In the context of tissue structure, what is the primary function of the extracellular matrix?
A. To provide structural support to the tissue
B. To regulate the exchange of nutrients and waste products
C. To facilitate the movement of cells through the tissue
D. To regulate the immune response
Question 12
A diagram of the human kidney is shown below. Which part of the kidney is responsible for filtering waste from the blood?
A. Nephron
B. Renal pelvis
C. Ureter
D. Bladder
Question 13
The theory of evolution by natural selection was first proposed by Charles Darwin in his book 'On the Origin of Species'. Which of the following is a key concept of this theory?
A. Survival of the fittest
B. Speciation
C. Adaptation
D. Genetic drift
Question 14
A researcher is studying the effects of a new pesticide on a plant culture. The pesticide is found to inhibit the synthesis of the plant hormone auxin. What is the primary effect of the pesticide on the plant?
A. Inhibition of root growth
B. Inhibition of leaf growth
C. Inhibition of stem growth
D. Inhibition of flower formation
Question 15
The process by which cells divide to produce two daughter cells is called _______________.
A. mitosis
B. meiosis
C. binary fission
D. \endosymbiosis

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