POST UTME SKYLINE UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process by which a plant cell becomes a specialized cell type, such as a root hair cell or a trichome, is called
A. Differentiation
B. Mitosis
C. Meiosis
D. Endosymbiosis
Question 2
A population of rabbits is growing at a rate of 20% per year. If the initial population is 100 rabbits, what will be the population after 5 years?
A. 1000
B. 5000
C. 10000
D. 20000
Question 3
In a tropical rainforest e\cosystem, the nutrient cycle is primarily driven by the decomposition of organic matter by which of the following organisms?
A. Fungi
B. Bacteria
C. Protozoa
D. Rotifers
Question 4
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 5
A 2.5-g sample of a subs\tance is dissolved in 25 mL of water. If the resulting solution has a concentration of 0.15 M, what is the molar mass of the subs\tance?
A. 10 g/mol
B. 20 g/mol
C. 30 g/mol
D. 40 g/mol
Question 6
A diagram of a human reproductive system is shown below. What is the function of the part labeled 'B'?
A. To produce sperm
B. To produce eggs
C. To transport sperm to the egg
D. To transport the fertilized egg to the uterus
Question 7
A plant has a root system with a radius of 10 cm and a height of 20 cm. What is the surface area of the root system?
A. 100
B. 200
C. 314.16
D. 500
Question 8
The xylem sap of a plant contains 0.5 M glu\cose and 0.2 M sucrose. What is the total osmotic pressure of the xylem sap?
A. 0.3
B. 0.5
C. 0.7
D. 1.0
Question 9
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. Production of ATP
B. Production of NADH
C. Production of FADH2
D. Production of water
Question 10
In the process of cellular respiration, what is the primary function of the mitochondria?
A. To synthesize ATP from glu\cose
B. To break down glu\cose into pyruvate
C. To produce NADH and FADH2
D. To transport electrons in the electron transport chain
Question 11
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 12
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 13
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 14
A cell undergoes mitosis, resulting in two daughter cells. What is the total number of chromosomes in the daughter cells?
A. 2n
B. n
C. 2n + 1
D. n + 1
Question 15
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
A. To focus light onto the retina
B. To detect light and transmit signals to the brain
C. To regulate the amount of light entering the eye
D. To produce tears to lubricate the eye

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