POST UTME CALEB UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 2
In a human population, the frequency of the 'B' allele is 0.4. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous recessive genotype 'bb'?
A. 0.16
B. 0.36
C. 0.64
D. 0.84
Question 3
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Stimulation of the immune system
C. Maintenance of homeostasis through the release of hormones
D. Regulation of appetite and satiety
Question 4
A diagram of the human circulatory system is shown below. Which of the following structures is responsible for pumping blood from the heart to the lungs?
A. Heart
B. Pulmonary Artery
C. Pulmonary Vein
D. Lungs
Question 5
A patient has been diagnosed with a genetic disorder. The disorder is caused by a mutation in a gene that codes for a protein involved in DNA replication. Which of the following is the most likely explanation for this mutation?
A. Point mutation
B. Frameshift mutation
C. Deletion mutation
D. Insertion mutation
Question 6
In a population of rabbits, the average litter size is 7.5. Which of the following statistical measures is most likely to be used to describe the distribution of litter sizes?
A. Mean
B. Median
C. Mode
D. S\tandard deviation
Question 7
A diagram of a plant cell is shown below. Identify the structure labeled 'A'.
A. Mitochondria
B. Chloroplast
C. Nucleus
D. Vacuole
Question 8
A 5-year-old child is brought to the doctor with a complaint of fever and cough. The doctor orders a chest X-ray, which shows a consolidation in the right lower lobe. What is the most likely diagnosis?
A. Pneumonia
B. Asthma
C. Cystic Fibrosis
D. Tuberculosis
Question 9
A patient is diagnosed with a bacterial infection caused by Staphylococcus aureus. Which of the following antibiotics is most likely to be prescribed?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
D. Vancomycin
Question 10
The human body is composed of various types of tissues, including epithelial, connective, muscle, and nervous tissues. What is the primary function of epithelial tissue?
A. To provide structural support
B. To facilitate the exchange of nutrients and waste products
C. To produce hormones
D. To regulate body temperature
Question 11
In the context of evolutionary theories, what is the primary mechanism by which genetic drift leads to the fixation of a deleterious mutation?
A. Genetic hitchhiking
B. Mutation accumulation
C. Genetic drift
D. Gene flow
Question 12
A solution containing 0.1 M glu\cose and 0.1 M fructose is separated by a semipermeable membrane. If the concentration of glu\cose on the other side of the membrane is 0.2 M, what is the concentration of fructose?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 13
A diagram of the human digestive system is shown below. Identify the structure labeled 'B'.
A. Esophagus
B. Stomach
C. Small intestine
D. Large intestine
Question 14
A patient has been diagnosed with a bacterial infection. The bacteria are resis\tant to multiple antibiotics. Which of the following is the most likely explanation for this resis\tance?
A. Horizontal gene transfer
B. Vertical gene transfer
C. Mutation accumulation
D. Gene flow
Question 15
A 25-year-old woman is diagnosed with a genetic disorder that affects her ability to digest lactose. Which of the following enzymes is most likely deficient in her body?
A. Lactase
B. Amylase
C. Tryp\sin
D. Pep\sin

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