POST UTME NOUN 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant root system consists of a taproot and lateral roots. What is the primary function of the taproot?
A. Water and nutrient uptake
B. Support and anchorage
C. Storage of food and water
D. Photosynthesis
Question 2
A diagram of a human heart is shown below. What is the primary function of the atrioventricular (AV) node?
A. Regulating heart rate
B. Conducting electrical impulses
C. Pumping blood
D. Filtering blood
Question 3
A 5.0 L flask contains 2.0 mol of an ideal gas at 37°C. If the gas is compressed to 2.5 L, what is the new pressure?
A. 2.0 atm
B. 3.0 atm
C. 4.0 atm
D. 5.0 atm
Question 4
A 2-year-old child is diagnosed with a genetic disorder characterized by an inability to break down certain amino acids. Which of the following is a likely consequence of this disorder?
A. The child will experience muscle weakness and fatigue.
B. The child will have an increased risk of developing certain types of cancer.
C. The child will experience developmental delays and intellectual disability.
D. The child will have an increased risk of developing kidney stones.
Question 5
A researcher wants to study the effect of temperature on the growth rate of a plant. She sets up an experiment with three different temperatures: 20°C, 25°C, and 30°C. The growth rate of the plant is measured at each temperature. Which of the following is the most likely explanation for the observed data?
A. The growth rate of the plant increases with increa\sing temperature.
B. The growth rate of the plant decreases with increa\sing temperature.
C. The growth rate of the plant remains cons\tant at all temperatures.
D. The growth rate of the plant has a maximum at a certain temperature.
Question 6
A researcher is studying the effects of a new medication on blood pressure. The researcher measures the blood pressure of 10 patients before and after taking the medication. The results are as follows: Before: 120/80, 130/90, 110/70, 140/100, 125/85, 135/95, 115/75, 145/105, 130/90, 120/80. After: 100/60, 110/70, 90/50, 120/80, 105/65, 115/75, 95/55, 125/85, 110/70, 100/60. What is the average decrease in systolic blood pressure?
A. 10
B. 15
C. 20
D. 25
Question 7
A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. If 1.0 mol of gas is added to the flask, what is the new pressure?
A. 2.5 atm
B. 3.0 atm
C. 4.0 atm
D. 5.0 atm
Question 8
A diagram of the human digestive system is shown below. Which part of the diagram is responsible for the breakdown of proteins?
A. Mouth
B. Stomach
C. Small intestine
D. Large intestine
Question 9
A 35-year-old woman is diagnosed with a type of cancer that is caused by a mutation in the BRCA1 gene. Which of the following is a likely consequence of this mutation?
A. The woman will experience premature menopause.
B. The woman will have an increased risk of developing ovarian cancer.
C. The woman will have an increased risk of developing breast cancer.
D. The woman will experience infertility.
Question 10
A 25-year-old man is diagnosed with a genetic disorder that affects his ability to metabolize certain amino acids. Which of the following is a likely consequence of this disorder?
A. The man will experience muscle weakness and fatigue.
B. The man will have an increased risk of developing certain types of cancer.
C. The man will experience developmental delays and intellectual disability.
D. The man will have an increased risk of developing kidney stones.
Question 11
A plant has a root system with a total surface area of 100 cm². If the root system is 50% covered with mycorrhizal fungi, what is the surface area of the root system covered with mycorrhizal fungi?
A. 50 cm²
B. 75 cm²
C. 100 cm²
D. 125 cm²
Question 12
In a sexual reproduction cycle, what is the term for the fusion of male and female gametes?
A. Meiosis
B. Mitosis
C. Fertilization
D. Syngamy
Question 13
A diagram of a human kidney is shown below. What is the primary function of the renal corpuscle?
A. Filtering waste and excess fluids
B. Regulating blood pressure
C. Producing hormones
D. Storing waste and excess fluids
Question 14
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 homozygous recessive genotype 'rr'?
A. 0.04
B. 0.08
C. 0.16
D. 0.32
Question 15
A diagram of the human respiratory system is shown below. Which part of the diagram is responsible for the exchange of oxygen and carbon dioxide?
A. Trachea
B. Lungs
C. Diaphragm
D. Bronchi

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