POST UTME SKYLINE UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 30-year-old athlete is experiencing shortness of breath and fatigue during exercise. Which of the following transport systems is most likely to be impaired?
A. Xylem
B. Phloem
C. Blood
D. Lymphatic system
Question 2
A population of rabbits is growing according to the \logistic growth model. If the initial population is 100 rabbits and the carrying capacity is 500 rabbits, what is the population after 5 years?
A. 200 rabbits
B. 300 rabbits
C. 400 rabbits
D. 500 rabbits
Question 3
A population of Drosophila melanogaster is maintained in a laboratory for genetic studies. The population is allowed to breed for several generations, and the frequency of the recessive allele for the eye color gene is observed to be 0.2. What is the genotype and phenotype of the individuals in the population?
A. Genotype: Bb, Phenotype: Brown eyes
B. Genotype: BB, Phenotype: Brown eyes
C. Genotype: Bb, Phenotype: Blue eyes
D. Genotype: bb, Phenotype: Blue eyes
Question 4
The transport of water and nutrients from the roots to the leaves of a plant, through the xylem, is an example of
A. Transpiration
B. Translocation
C. Osmosis
D. Diffusion
Question 5
A plant hormone that promotes cell elongation and cell division is?
A. Auxin
B. Cytokinin
C. Ethylene
D. Abscisic acid
Question 6
The transport of water and minerals from the roots to the leaves of a plant, through the xylem, is an example of
A. Transpiration
B. Translocation
C. Osmosis
D. Diffusion
Question 7
A cell in the G2 phase of the cell cycle has a DNA content of 8C. What is the stage of the cell cycle when the DNA content is 4C?
A. G1
B. G2
C. S
D. M
Question 8
A diagram of a titration setup is shown below. What is the purpose of the burette?
A. To measure the volume of the acid
B. To measure the volume of the base
C. To mix the acid and base
D. To measure the pH of the solution
Question 9
A neuron is stimulated by a sensory receptor and generates an action potential. Which of the following is the primary mechanism by which the action potential is propagated along the length of the neuron?
A. Electrotonic conduction
B. Saltatory conduction
C. Continuous conduction
D. Synaptic transmission
Question 10
A 40-year-old patient is experiencing muscle weakness and fatigue. Which of the following tissue types is most likely to be affected?
A. Epithelial
B. Connective
C. Muscle
D. Nervous
Question 11
A plant has a xylem tissue that is responsible for transporting water and minerals from the roots to the leaves. What is the primary function of the xylem tissue?
A. To transport sugars from the leaves to the roots
B. To transport water and minerals from the roots to the leaves
C. To transport gases from the roots to the leaves
D. To transport waste products from the leaves to the roots
Question 12
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells, each with the same number and kind of chromosomes as the parent cell, is called
A. Mitosis
B. Meiosis
C. Binary Fission
D. Endosymbiosis
Question 13
In the context of classification of living things, what is the primary function of the kingdom level?
A. To group organisms based on their cell structure
B. To group organisms based on their genetic makeup
C. To group organisms based on their body structure
D. To group organisms based on their habitat
Question 14
A 10-mL sample of a solution containing 0.5 M glu\cose is diluted to 50 mL. What is the concentration of the resulting solution?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 15
In the process of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
B. To pump protons across the mitochondrial membrane, creating a proton gradient
C. To reduce NADH and FADH2 to NAD+ and FAD
D. To produce water and carbon dioxide as byproducts

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