POST UTME AAUA 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A researcher is studying the genetic variation in a population of plants. Which of the following types of genetic variation is most likely to result in a change in the plant's phenotype?
A. Genetic drift
B. Mutation
C. Gene flow
D. Natural selection
Question 2
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 3
A population of rabbits is introduced to an island with no natural predators. What will happen to the population?
A. The population will remain cons\tant
B. The population will decrease due to overcrowding
C. The population will increase exponentially
D. The population will stabilize at a carrying capacity
Question 4
A plant cell is placed in a solution with a high concentration of sugar. What will happen to the cell?
A. The cell will swell and eventually burst due to water uptake
B. The cell will shrink due to water loss
C. The cell will remain unchanged
D. The cell will undergo photosynthesis
Question 5
A patient is diagnosed with a bacterial infection. The patient's blood sample is sent to a laboratory for analysis. Which of the following types of microorganisms is most likely to be responsible for this infection?
A. Bacterium
B. Virus
C. Fungus
D. Parasite
Question 6
In the context of osmoregulation, what is the primary function of the kidneys in maintaining electrolyte balance?
A. To regulate the amount of water in the body
B. To maintain the balance of electrolytes in the body
C. To remove waste products from the body
D. To regulate blood pressure
Question 7
A plant undergoes a process of photosynthesis. What is the overall equation for this process?
A. \( 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2 \)
B. \( 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 3O_2 \)
C. \( 6CO_2 + 6H_2O \rightarrow 2C_6H_{12}O_6 + 6O_2 \)
D. \( 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 12O_2 \)
Question 8
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 9
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 10
A patient is diagnosed with a rare genetic disorder that affects the production of a specific enzyme. Which of the following types of mutations is most likely responsible for this condition?
A. Point mutation
B. Frameshift mutation
C. Deletion mutation
D. Insertion mutation
Question 11
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 12
A patient with a neuro\logical disorder has a lesion in the motor cortex of the brain. What is the likely effect of this lesion on the patient's motor function?
A. Increased motor function
B. Decreased motor function
C. No effect on motor function
D. Variable motor function
Question 13
In a population of 100 individuals, 60 have the genotype AA and 40 have the genotype Aa. What is the frequency of the recessive allele?
A. 0.2
B. 0.3
C. 0.4
D. 0.5
Question 14
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 15
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

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