POST UTME REDEEMERS UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 40-year-old man is diagnosed with a rare disease that affects his ability to regulate his body temperature. Which of the following is the most likely cause of his condition?
A. Genetic mutation in the TRPV1 gene
B. Genetic mutation in the TRPM8 gene
C. Genetic mutation in the KCNQ1 gene
D. Genetic mutation in the SCN9A gene
Question 2
In the context of genetics, what is the term for the process by which a gene is turned on or off in response to changes in the environment?
A. Epigenetics
B. Gene expression
C. Mutation
D. Genetic drift
Question 3
In the context of respiration, what is the term for the process by which oxygen is transported from the lungs to the tissues?
A. Oxygen diffusion
B. Oxygen convection
C. Oxygen perfusion
D. Oxygen filtration
Question 4
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. To synthesize proteins
B. To store genetic information
C. To regulate cell growth
D. To transport subs\tances across the cell membrane
Question 5
A 2.5 L flask contains a mixture of CO2 and O2 at 25°C and 1 atm. If 0.5 L of O2 is removed, what is the partial pressure of CO2?
A. 0.2 atm
B. 0.5 atm
C. 0.8 atm
D. 1.0 atm
Question 6
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 7
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 'BB'?
A. 0.2
B. 0.4
C. 0.6
D. 0.8
Question 8
A 2.0 L flask contains 1.0 mol of an ideal gas at 300 K. If the gas is heated to 400 K at cons\tant volume, what is the new pressure?
A. 1.5 atm
B. 2.0 atm
C. 2.5 atm
D. 3.0 atm
Question 9
In the context of evolutionary theories, what is the primary mechanism by which genetic drift can lead to the loss of genetic variation in a population?
A. Gene flow
B. Mutation
C. Genetic drift
D. Natural selection
Question 10
In the context of coordination, what is the term for the process by which the nervous system integrates sensory information from different parts of the body?
A. Sensory integration
B. Motor control
C. Proprioception
D. Gait analysis
Question 11
A plant cell has a vacuole that contains 0.5 M KCl. If the cell is placed in a solution with a pH of 7.0, what is the concentration of Cl- ions outside the cell?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M
Question 12
A 30-year-old woman is diagnosed with a rare disease that affects her ability to regulate her blood pressure. Which of the following is the most likely cause of her condition?
A. Genetic mutation in the ACE gene
B. Genetic mutation in the AGT gene
C. Genetic mutation in the CYP11B2 gene
D. Genetic mutation in the CYP21A2 gene
Question 13
A 50-year-old man is diagnosed with a rare genetic disorder that affects his sense of smell. Which of the following is the most likely cause of his condition?
A. Genetic mutation in the OR6A2 gene
B. Genetic mutation in the TAS2R38 gene
C. Genetic mutation in the TRPV1 gene
D. Genetic mutation in the P2RY8 gene
Question 14
A diagram of a human eye is shown below. Identify the part labeled A.
A. Cornea
B. Iris
C. Retina
D. Optic nerve
Question 15
A species of bird is found in a specific type of forest. If the forest is cleared for agriculture, what is the likely effect on the bird population?
A. The population will increase
B. The population will decrease
C. The population will remain the same
D. The population will migrate to a different forest

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