POST UTME AAUA 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a study on the epidemio\logy of malaria, researchers found that the prevalence of the disease was higher in areas with poor sanitation and inadequate waste management. Which of the following is the most likely explanation for this finding?
A. The presence of s\tanding water allows the mosquito vector to breed and multiply.
B. Poor sanitation leads to the spread of other diseases that weaken the immune system, making individuals more susceptible to malaria.
C. Inadequate waste management attracts rodents that carry the disease-cau\sing parasite.
D. The high population density in these areas leads to increased transmission of the disease.
Question 2
A patient with a genetic disorder has a mutation in the HBB gene, which codes for the \beta-globin subunit of hemoglobin. What is the likely effect of this mutation on the patient's hemoglobin levels?
A. Increased hemoglobin levels
B. Decreased hemoglobin levels
C. No effect on hemoglobin levels
D. Variable hemoglobin levels
Question 3
In a desert e\cosystem, what is the primary mechanism by which plants regulate water loss through their leaves?
A. Stomatal closure
B. Cuticular transpiration
C. Transpiration pull
D. Root pressure
Question 4
A population of 1000 rabbits is growing at a rate of 10% per year. What is the population after 5 years?
A. 1000
B. 1100
C. 1200
D. 1300
Question 5
In a xylem vessel, what is the primary mechanism by which water is transported from the roots to the leaves?
A. Transpiration pull
B. Root pressure
C. Capillary action
D. Osmosis
Question 6
A patient with a genetic disorder has a mutation in the BRCA1 gene, which codes for a protein involved in DNA repair. What is the likely effect of this mutation on the patient's risk of developing cancer?
A. Increased risk of developing cancer
B. Decreased risk of developing cancer
C. No effect on risk of developing cancer
D. Variable risk of developing cancer
Question 7
A researcher is studying the effect of temperature on the growth of a plant. The researcher measures the growth of the plant at different temperatures and plots the data on a graph. Which of the following types of graphs would be most appropriate for this data?
A. Bar graph
B. Line graph
C. Scatter plot
D. Pie chart
Question 8
A researcher is studying the effect of pH on the growth of E. coli. The researcher measures the growth of E. coli in different pH levels and plots the data on a graph. Which of the following types of graphs would be most appropriate for this data?
A. Bar graph
B. Line graph
C. Scatter plot
D. Pie chart
Question 9
A diagram of the human respiratory system is shown below. Which of the following is a function of the lungs?
A. Exchange of oxygen and carbon dioxide
B. Production of sound
C. Storage of air
D. Elimination of waste
Question 10
A patient with a bacterial infection has a fever of 38°C. What is the likely effect of the infection on the patient's body temperature?
A. Increased body temperature
B. Decreased body temperature
C. No effect on body temperature
D. Variable body temperature
Question 11
A 50g sample of a subs\tance contains 20g of carbon. What is the percentage composition of carbon in the subs\tance?
A. 30%
B. 40%
C. 50%
D. 60%
Question 12
A patient with a severe head injury is experiencing difficulty with speech and language proces\sing. Which of the following brain regions is primarily responsible for language proces\sing?
A. Frontal lobe
B. Parietal lobe
C. Temporal lobe
D. Occipital lobe
Question 13
A plant with the genotype Rr, where R represents the dominant allele for red flowers and r represents the recessive allele for white flowers, is crossed with a plant with the genotype rr. What is the probability that the offspring will have red flowers?
A. 0.5
B. 0.25
C. 0.75
D. 0.33
Question 14
A patient is diagnosed with a genetic disorder. The patient's genetic makeup is analyzed and found to have a mutation in the DNA sequence. Which of the following types of mutations is most likely responsible for this disorder?
A. Point mutation
B. Frameshift mutation
C. Deletion mutation
D. Insertion mutation
Question 15
In the context of osmoregulation, what is the primary function of the kidneys in a desert-dwelling organism?
A. To conserve water by producing highly concentrated urine
B. To excrete excess salt and water through the process of osmoregulation
C. To regulate the body's pH levels through the excretion of acid or base
D. To produce hormones that stimulate the release of water from the body

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