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POST UTME SKYLINE UNIVERSITY 2025 Biology | Objective

Are you preparing for POST UTME SKYLINE UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2025 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1

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

Correct B. Apomixis

C. Parthenogenesis

D. Bisexual reproduction

Correct Answer: B

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Question 2

A diagram of the human eye is shown below. What is the function of the part labeled 'A'?

Correct 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

Correct Answer: A

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Question 3

A population of a certain species of bird is found in a specific habitat. What is the term for this type of population?

Correct A. Endemic population

B. Exotic population

C. Native population

D. Invasive population

Correct Answer: A

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Question 4

A diagram of a cell is shown below. What is the function of the part labeled 'B'?

A. To synthesize proteins

Correct B. To store genetic information

C. To regulate cell growth

D. To transport molecules

Correct Answer: B

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Question 5

A species of plant exhibits a phenomenon where it can reproduce asexually through budding. What is the term for this type of reproduction?

A. Apomixis

Correct B. Budding

C. Fragmentation

D. Regeneration

Correct Answer: B

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Question 6

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.

Correct C. Lamin A is phosphorylated by the enzyme CDK1.

D. Lamin A is involved in the regulation of gene expression.

Correct Answer: C

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Question 7

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

Correct B. 0.01 M/min

C. 0.1 M/min

D. 1 M/min

Correct Answer: B

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Question 8

A diagram of the human eye is shown below. What is the function of the part labeled 'A'?

Correct A. To focus light on the retina.

B. To adjust the amount of light entering the eye.

C. To detect movement.

D. To regulate the eye's temperature.

Correct Answer: A

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Question 9

A population of bacteria is growing exponentially, with a growth rate of 0.05/h. If the initial population size is 1000, what is the population size after 2 hours?

A. 2000

Correct B. 4000

C. 6000

D. 8000

Correct Answer: B

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Question 10

A DNA molecule has the following sequence: ATCGATCG. What is the complementary sequence?

Correct A. TAGCTAGC

B. ATCGATCG

C. TCGATCGA

D. GCTAGCTA

Correct Answer: A

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Question 11

In the context of evolutionary bio\logy, what is the primary mechanism driving the adaptation of species to their environments?

Correct A. Natural Selection

B. Genetic Drift

C. Gene Flow

D. Mutation

Correct Answer: A

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Question 12

Asexual reproduction in plants can occur through the production of what type of spores?

A. Mushroom

Correct B. Bryophyte

C. Lichen

D. Fern

Correct Answer: B

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Question 13

The process of photosynthesis in plants involves the conversion of what type of energy into chemical energy?

A. Thermal

B. Kinetic

C. Potential

Correct D. Radiant

Correct Answer: D

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Question 14

The human body is composed of what type of tissue that provides structural support and protection?

A. Epithelial

Correct B. Connective

C. Muscular

D. Nervous

Correct Answer: B

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Question 15

The process of digestion in the human body involves the breakdown of what type of molecule into smaller units?

A. Carbohydrate

Correct B. Protein

C. Lipid

D. Nucleic Acid

Correct Answer: B

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Question 16

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 homozygous dominant genotype?

Correct A. 0.36

B. 0.64

C. 0.72

D. 0.84

Correct Answer: A

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Question 17

A researcher is studying the effect of pH on the growth of Escherichia coli. The researcher measures the growth rate of the bacteria at 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

Correct B. Line graph

C. Scatter plot

D. Pie chart

Correct Answer: B

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Question 18

A cell is in the G2 phase of the cell cycle. Which of the following is a characteristic of this phase?

A. DNA replication occurs

B. Mitosis occurs

Correct C. The cell prepares for mitosis

D. The cell grows and prepares for DNA replication

Correct Answer: C

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Question 19

A researcher is studying the effect of temperature on the growth of a microorganism. The researcher measures the growth rate of the microorganism 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

Correct B. Line graph

C. Scatter plot

D. Pie chart

Correct Answer: B

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Question 20

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

Correct 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

Correct Answer: B

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Question 21

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

Correct B. No mutation

C. No gene flow

D. No natural selection

Correct Answer: B

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Question 22

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?

Correct A. 0.4

B. 0.5

C. 0.6

D. 0.7

Correct Answer: A

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Question 23

A species of bird has a wing span of 2 meters. If the bird is flying at a speed of 50 km/h, what is the power output of the bird's wings?

A. 100 W

B. 200 W

Correct C. 500 W

D. 1000 W

Correct Answer: C

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Question 24

A cell is placed in a solution with a pH of 5. If the cell has a membrane potential of -70 mV, what is the concentration of hydrogen ions in the solution?

A. 10^{-5} M

Correct B. 10^{-6} M

C. 10^{-7} M

D. 10^{-8} M

Correct Answer: B

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Question 25

A plant has a root system with a total surface area of 100 cm^2. If the plant is growing in a solution with a concentration of 10^{-3} M, what is the rate of nutrient uptake?

A. 10^{-6} mol/s

Correct B. 10^{-5} mol/s

C. 10^{-4} mol/s

D. 10^{-3} mol/s

Correct Answer: B

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