POST UTME SKYLINE UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'Rr'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 2
What is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Heritability
B. Genetic drift
C. Mutation
D. Inheri\tance
Question 3
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of what protein complex?
A. Protein Kinase C
B. Cyclin-dep\endent kinase
C. Histone deacetylase
D. Protein phosphatase 2A
Question 4
A researcher is studying the effect of temperature on the growth rate of a microorganism. Which of the following is a likely consequence of increa\sing the temperature?
A. The growth rate will decrease
B. The growth rate will increase
C. The growth rate will remain the same
D. The microorganism will not grow
Question 5
A 0.5 L flask contains 0.2 mol of an ideal gas at 37°C. What is the volume of the gas?
A. 0.5 L
B. 1.0 L
C. 1.5 L
D. 2.0 L
Question 6
The theory of evolution by natural selection was first proposed by Charles Darwin in his book 'On the Origin of Species'. Which of the following is a key concept of this theory?
A. Species evolve over time through a process of mutation and genetic drift
B. Species evolve over time through a process of natural selection and genetic variation
C. Species remain unchanged over time due to the lack of genetic variation
D. Species evolve over time through a process of artificial selection and genetic engineering
Question 7
The theory of evolution by natural selection was first proposed by
A. Charles Darwin
B. Gregor M\endel
C. Jean-Baptiste Lamarck
D. Alfred Russel Wallace
Question 8
The diagram below shows a cross-section of a leaf. What is the function of the xylem in this leaf?
A. To transport water and minerals from the roots to the leaves
B. To synthesize chlorophyll
C. To store nutrients
D. To regulate the opening and clo\sing of the stomata
Question 9
The process of mitosis in somatic cells results in the production of two daughter cells that are genetically identical to the parent cell. Which of the following is a characteristic of the products of mitosis?
A. Diploid cells with increased genetic variation
B. Haploid cells with reduced genetic variation
C. Triploid cells with no genetic variation
D. Polyploid cells with increased genetic variation
Question 10
The diagram below shows the structure of a typical plant root. Identify the part labeled A.
A. root hair
B. cortex
C. xylem
D. phloem
Question 11
A patient is diagnosed with a viral infection that is cau\sing inflammation in the body. Which of the following is a likely consequence of this inflammation?
A. The patient will experience a decrease in body temperature
B. The patient will experience an increase in body temperature
C. The patient will experience a decrease in heart rate
D. The patient will experience a decrease in blood pressure
Question 12
The diagram below shows the structure of a plant cell. Which of the following organelles is responsible for photosynthesis?
A. Vacuole
B. Chloroplast
C. Nucleus
D. Mitochondria
Question 13
A 2.5 L flask contains 0.5 mol of an ideal gas at 27°C. What is the pressure of the gas?
A. 1.5 atm
B. 2.5 atm
C. 3.5 atm
D. 4.5 atm
Question 14
The rate of diffusion of a subs\tance through a membrane is influenced by the
A. concentration gradient
B. temperature
C. pressure
D. surface area
Question 15
The diagram below shows a cross-section of a leaf. What is the function of the stomata in this leaf?
A. To synthesize chlorophyll
B. To store nutrients
C. To regulate the opening and clo\sing of the stomata
D. To transport water and minerals from the roots to the leaves

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