POST UTME RSU 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A researcher is studying the effect of pH on the growth of E. coli. The graph below shows the growth of E. coli at different pH levels. What is the optimal pH for the growth of E. coli?
A. 6.5
B. 7.5
C. 8.5
D. 9.5
Question 2
The process of gas exchange in the human respiratory system involves the diffusion of oxygen and carbon dioxide across the alveolar-capillary membrane. Which of the following best describes the direction of diffusion of oxygen and carbon dioxide?
A. From the alveoli to the blood
B. From the blood to the alveoli
C. From the alveoli to the blood and from the blood to the alveoli
D. From the alveoli to the blood and from the blood to the environment
Question 3
A 2.5 L flask contains 0.5 M glu\cose solution. If 0.1 M NaOH is added to the solution, what is the pH of the resulting solution?
A. 11.5
B. 12.3
C. 13.1
D. 14.5
Question 4
The sense organ responsible for detecting changes in light intensity is the
A. Eye
B. Ear
C. Nose
D. Tongue
Question 5
A 35-year-old man presents with symptoms of shortness of breath, chest pain, and palpitations. His electrocardiogram (ECG) shows a prolonged QT interval. Which of the following is the most likely diagnosis?
A. Hypertrophic Cardiomyopathy
B. Dilated Cardiomyopathy
C. Arrhythmogenic Right Ventricular Cardiomyopathy
D. Long QT Syndrome
Question 6
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. 0.48
D. 0.16
Question 7
A 25-year-old woman presents with symptoms of fatigue, weight loss, and abdominal pain. Her hemoglobin level is 8.5 g/dL. Which of the following is the most likely diagnosis?
A. Iron Deficiency Anemia
B. Vitamin B12 Deficiency
C. Folate Deficiency
D. Thalassemia
Question 8
The sense organ responsible for detecting changes in sound waves is the
A. Eye
B. Ear
C. Nose
D. Tongue
Question 9
The process of osmoregulation in animals involves the regulation of water and electrolyte balance. Which of the following is a mechanism by which animals osmoregulate?
A. Kidney function
B. Hormonal regulation
C. Behavioral adaptations
D. All of the above
Question 10
The process of mitosis involves the division of a eukaryotic cell into two daughter cells. Which of the following stages of mitosis is characterized by the condensation of chromosomes?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 11
The diagram below shows the structure of a plant cell. Which of the following organelles is responsible for protein synthesis?
A. Nucleus
B. Mitochondria
C. Ribosomes
D. Endoplasmic reticulum
Question 12
A patient is diagnosed with a genetic disorder caused by a point mutation in a gene encoding a protein involved in DNA repair. Which of the following is a likely consequence of this mutation?
A. Increased risk of cancer
B. Increased risk of genetic disorders
C. Decreased risk of genetic disorders
D. No effect on genetic disorders
Question 13
A researcher is studying the effect of a new drug on a population of mice. The researcher observes that the mice have an increased risk of cancer. What is the most likely explanation for this observation?
A. The drug causes a mutation in a gene involved in DNA repair
B. The drug causes a mutation in a gene involved in cell cycle regulation
C. The drug causes a horizontal gene transfer of a gene involved in cancer
D. The drug causes a vertical gene transfer of a gene involved in cancer
Question 14
In a population of 1000 individuals, 200 are heterozygous for a particular gene, while 400 are homozygous recessive. What is the frequency of the dominant allele?
A. 0.4
B. 0.6
C. 0.8
D. 1.0
Question 15
In a diploid cell, what is the ratio of autosomal chromosomes to sex chromosomes during meiosis?
A. 1:1
B. 2:1
C. 1:2
D. 2:2

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