POST UTME NOUN 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The diagram below shows the structure of a human eye. Which of the following structures is responsible for adjusting the focus of light on the retina?
Question 2
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
Question 3
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 4
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 5
The process of photosynthesis occurs in the chloroplasts of plant cells. Which of the following reac\tants is converted into glu\cose during photosynthesis?
A. Carbon dioxide
B. Water
C. Glu\cose
D. Oxygen
Question 6
A diagram of the human circulatory system is shown below. Which part of the diagram is responsible for the regulation of blood pressure?
A. Heart
B. Arteries
C. Veins
D. Capillaries
Question 7
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 8
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
A. 0.4
B. 0.2
C. 0.6
D. 0.8
Question 9
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 10
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 11
A 30-year-old woman is diagnosed with a type of cancer that is caused by a mutation in the BRCA2 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 12
The Hardy-Weinberg principle states that the frequencies of alleles in a population will remain cons\tant from generation to generation in the absence of certain factors. Which of the following factors can cause a change in allele frequencies?
A. Mutation
B. Genetic drift
C. Gene flow
D. All of the above
Question 13
The process of mitosis results in the production of daughter cells that are genetically identical to the parent cell. Which of the following stages of mitosis is responsible for the separation of chromosomes?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 14
The diagram below shows the structure of a prokaryotic cell. Which of the following organelles is responsible for protein synthesis?
A. Nucleus
B. Ribosomes
C. Plasma membrane
D. Cytoplasm
Question 15
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.

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