POST UTME UNN 2017 Biology | Objective
Practice these randomly selected questions to test your readiness.
Question 1
A solution of glu\cose (C6H12O6) is titrated with a solution of potassium permanganate (KMnO4). The balanced equation for the reaction is: C6H12O6 + 6O2 → 6CO2 + 6H2O. If 25.0 mL of 0.100 M glu\cose solution is titrated with 0.0500 M KMnO4 solution, what is the number of moles of KMnO4 required?
Question 2
The process of genetic drift in a population of 100 individuals can be described by the equation (P(t) = P_0 left\( 1 - \frac{t}{\tau}\right \)^n), where \( P_0 \) is the initial population size, (t) is time, \( \tau \) is the relaxation time, and (n) is the number of generations. If the population size decreases by 50% after 10 generations, what is the value of (n)?
Question 3
The process of respiration in the human body involves the breakdown of glu\cose to produce energy in the form of ATP. What is the primary function of the mitochondria in this process?
Question 4
In a population of 1000 Drosophila melanogaster, 200 individuals exhibit the recessive trait of vestigial wings. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele?
Question 5
The xylem is a type of vascular tissue in plants that is responsible for transporting water and minerals from the roots to the leaves. What is the primary function of the xylem parenchyma cells?
Question 6
A 0.5 M solution of glu\cose (C6H12O6) is prepared by dissolving 25 g of glu\cose in 100 mL of water. What is the molarity of the solution?
Question 7
A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is permeable to sucrose, what is the concentration of sucrose in the cytosol after 10 minutes?
Question 8
The process by which an organism's genetic information is passed from one generation to the next, is known as
Question 9
The process of mitosis involves the division of a cell into two daughter cells. Which of the following stages of mitosis is responsible for the separation of chromosomes?
Question 10
A 2.00 L flask contains a mixture of 1.00 M HCl and 1.00 M NaOH. If 10.0 mL of 2.00 M HCl is added to the flask, what is the resulting concentration of HCl?
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
The type of tissue that is found in the walls of blood vessels and is responsible for the contraction and relaxation of the vessel walls, is known as
Question 13
A population of bacteria is growing exponentially with a growth rate of 20% per hour. If the initial population size is 1000, what is the population size after 3 hours?
Question 14
A species of plant has a seed production of 100 seeds per plant. If the seed production increases by 15% per generation, what is the seed production of the plant after 4 generations?
Question 15
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'BB'?
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