POST UTME SKYLINE UNIVERSITY 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of evolutionary bio\logy, what is the primary mechanism driving the adaptation of species to their environments?
A. Natural Selection
B. Genetic Drift
C. Gene Flow
D. Mutation
Question 2
Asexual reproduction in plants can occur through the production of what type of spores?
A. Mushroom
B. Bryophyte
C. Lichen
D. Fern
Question 3
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'R'?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 4
A tissue is composed of a mixture of cell types. Which of the following is a characteristic of a tissue?
A. The cells are all the same type
B. The cells are all specialized for a specific function
C. The cells are all connected by tight junctions
D. The cells are all surrounded by a basement membrane
Question 5
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
A. To focus light on the retina
B. To detect movement
C. To regulate the amount of light entering the eye
D. To produce tears
Question 6
A plant cell is placed in a solution containing 0.1 M glu\cose. After 30 minutes, the cell's glu\cose concentration is measured to be 0.05 M. What is the rate of glu\cose uptake by the cell?
A. 0.001 M/min
B. 0.01 M/min
C. 0.1 M/min
D. 1 M/min
Question 7
In a population of 100 individuals, 60 are heterozygous for a particular gene, and 20 are homozygous recessive. What is the frequency of the dominant allele?
A. 0.4
B. 0.5
C. 0.6
D. 0.7
Question 8
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
D. No natural selection
Question 9
A species of plant exhibits a phenomenon where it can reproduce asexually through fragmentation, but also has a sexual reproductive mode. What is the term for this type of reproduction?
A. Hermaphroditism
B. Apomixis
C. Parthenogenesis
D. Bisexual reproduction
Question 10
The genetic code is a set of rules used by living cells to translate information encoded within genetic material into proteins. Which of the following is a type of mutation that results in a change in the DNA sequence?
A. Point mutation
B. Frameshift mutation
C. Deletion
D. Insertion
Question 11
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is mediated by the phosphorylation of the nuclear lamina protein, lamin A. Which of the following statements about lamin A is correct?
A. Lamin A is a type of histone protein.
B. Lamin A is a component of the nuclear matrix.
C. Lamin A is phosphorylated by the enzyme CDK1.
D. Lamin A is involved in the regulation of gene expression.
Question 12
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
D. No natural selection
Question 13
The excretory system in humans is responsible for removing waste products from the body. Which of the following organs is the primary site of urine formation?
A. Kidneys
B. Liver
C. Pancreas
D. Spleen
Question 14
The human eye has a highly developed sense organ called the retina. Which of the following types of cells in the retina is responsible for detecting light?
A. Bipolar cells
B. Ganglion cells
C. Amacrine cells
D. Photoreceptor cells
Question 15
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'?
A. 0.64
B. 0.36
C. 0.48
D. 0.16

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