POST UTME PAN-ATLANTIC UNIVERSITY 2021 Biology | Objective
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Question 1
A plant has a mutation in its Xylem tissue that causes it to produce more xylem sap than normal. If the plant's normal xylem sap production rate is 10 liters per hour, and the mutated plant produces 20 liters per hour, what is the ratio of the mutated plant's xylem sap production rate to the normal plant's xylem sap production rate?
Question 2
In the context of eco\logy, what is the term for the process by which plants convert light energy into chemical energy?
Question 3
A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. If 1.0 mol of gas is added to the flask, what is the new pressure?
Question 4
In the process of excretion, what is the primary function of the kidneys in removing waste products from the blood?
Question 5
In asexual reproduction, what is the term for the process by which a cell divides to produce two daughter cells?
Question 6
The process of respiration in plants involves the breakdown of
Question 7
A 2-year-old child is diagnosed with a rare genetic disorder characterized by an inability to metabolize certain amino acids. Which of the following is a likely consequence of this disorder?
Question 8
A diagram of the human eye is shown below. Identify the part labeled 'A'.
Question 9
In genetics, what is the term for the process by which an organism's genetic information is passed from one generation to the next?
Question 10
In a population of E. coli bacteria, the average generation time is 30 minutes. If the initial population size is 10^6 cells, calculate the population size after 4 hours, assuming exponential growth with a growth rate of 0.5 per hour.
Question 11
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'?
Question 12
A patient is diagnosed with a kidney disease that causes an imbalance of electrolytes in the body. Which of the following is a likely consequence of this disease?
Question 13
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population size is 1000, how many individuals are expected to be homozygous recessive?
Question 14
In a population of 1000 individuals, 60% have the dominant allele for brown eye color (B) and 40% have the recessive allele (b). If two individuals with brown eye color are randomly selected for a study, what is the probability that they are both homozygous dominant (BB) for the brown eye color trait?
Question 15
A cell's plasma membrane is selectively permeable, allowing certain subs\tances to pass through while restricting others. What is the primary mechanism by which this selectivity is achieved?
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