POST UTME RHEMA UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 30-year-old woman is experiencing symptoms of depression. Her doctor prescribes her a medication that affects the neurotransmitter serotonin. What is the primary mechanism by which this medication works?
A. Inhibiting the reuptake of serotonin
B. Increa\sing the release of serotonin
C. Blocking the action of serotonin
D. Increa\sing the synthesis of serotonin
Question 2
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.64
B. 0.36
C. 0.16
D. 0.04
Question 3
The diagram below shows the structure of a plant cell. Which of the following organelles is responsible for the synthesis of proteins?
A. Mitochondria
B. Nucleus
C. Ribosome
D. Endoplasmic reticulum
Question 4
A population of Drosophila melanogaster is being studied for its adaptation to a changing environment. Which of the following evolutionary mechanisms is most likely responsible for the observed changes?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 5
In the context of evolutionary theory, what is the term for the process by which a species becomes better suited to its environment over time?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 6
The genetic variation that occurs due to the presence of multiple alleles of a gene is known as:
A. Genetic drift
B. Mutation
C. Genetic variation
D. Polygenic inheri\tance
Question 7
A diagram of a plant cell is shown below. Identify the organelle responsible for protein synthesis.
A. Nucleus
B. Mitochondria
C. Ribosome
D. Lysosome
Question 8
In a typical plant cell, the process of photosynthesis occurs in the following organelle:
A. Mitochondria
B. Chloroplast
C. Endoplasmic Reticulum
D. Lysosome
Question 9
A 2.0 L flask contains 1.0 mol of an ideal gas at a temperature of 400 K. What is the volume of the gas at a temperature of 200 K?
A. 1.0 L
B. 1.5 L
C. 2.0 L
D. 2.5 L
Question 10
A diagram of a plant cell is shown below. What is the function of the cell wall?
A. Provides structural support
B. Regulates the movement of materials in and out of the cell
C. Produces proteins
D. Stores genetic information
Question 11
A 2-year-old child is brought to the doctor with a history of frequent infections. The child's mother reports that the child has been taking antibiotics for the past 6 months. What is the most likely cause of the child's condition?
A. Genetic mutation
B. Environmental factor
C. Imbalanced gut microbiome
D. Viral infection
Question 12
A plant with a mutation in the R gene has a flower color of red. If the plant is crossed with a plant with a mutation in the r gene, what is the probability that the offspring will have a flower color of red?
A. 0.5
B. 0.25
C. 0.75
D. 0.33
Question 13
A 5.0 L flask contains 2.5 mol of an ideal gas at a temperature of 300 K. What is the pressure of the gas?
A. 1.5 atm
B. 2.0 atm
C. 2.5 atm
D. 3.0 atm
Question 14
The process of digestion in the small intestine involves the breakdown of proteins into:
A. Carbohydrates
B. Fats
C. Amino acids
D. Nucleic acids
Question 15
The human body is composed of four main types of tissues: epithelial, connective, muscle, and nervous. Which of the following is a characteristic of epithelial tissue?
A. It is found in the dermis layer of the skin
B. It forms glands and ducts
C. It is composed of muscle fibers
D. It is found in the bone marrow

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