POST UTME EKSU 2025 Biology | Objective
Practice these randomly selected questions to test your readiness.
Question 1
A diagram of a cell division is shown below. Identify the stage of cell division where the chromosomes are aligned at the center of the cell.
Question 2
A cell is placed in a solution with a pH of 7. If the cell membrane has a permeability coefficient of 0.01 cm/s, and the concentration gradient of H+ ions is 10^-7 M/cm, what is the rate of diffusion of H+ ions across the cell membrane?
Question 3
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
Question 4
A bio\logist is studying the effect of pH on the growth of E. coli. The growth rate is measured in terms of the rate of increase in cell density. If the growth rate is given by the equation \( \frac{dN}{dt} = rN\( 1 - \frac{N}{K} \ \) ), where N is the cell density, r is the growth rate cons\tant, and K is the carrying capacity, what is the value of r if the growth rate is 0.5 and the carrying capacity is 100?
Question 5
In a population of 1000 individuals, 70% are heterozygous for the ABO blood group, 20% are homozygous dominant, and 10% are homozygous recessive. What is the genotype and phenotype of the individual represented by the Punnett square below?
Question 6
A bio\logist is studying the cell cycle. Which of the following stages is characterized by DNA replication?
Question 7
The process of respiration in a cell results in the production of?
Question 8
A plant grows from a seed in a controlled environment. The plant's growth is measured over time, and the data is plotted below. What is the average rate of growth of the plant?
Question 9
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 10
The process of mitosis is shown below. Which of the following is a characteristic of the prophase stage?
Question 11
A 5% solution of glu\cose in water is added to a 10% solution of glu\cose in water. What is the resulting concentration of glu\cose in the mixture?
Question 12
In the context of asexual reproduction, what is the primary advantage of budding in yeast?
Question 13
A plant grows from a seed in a controlled environment. The initial height of the plant is 5 cm. After 5 days, the plant grows to 10 cm. What is the average rate of growth of the plant?
Question 14
A plant has a leaf with a surface area of 10 cm^2. If the leaf is exposed to light for 8 hours, and the rate of photosynthesis is 2.5 mg CO2/h, what is the total amount of CO2 fixed by the leaf?
Question 15
A 2.5 L solution contains 0.5 M glu\cose and 0.2 M fructose. What is the total molarity of the solution?
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