POST UTME SKYLINE UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 2
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
Question 3
In the xylem, water and minerals are transported from the roots to the leaves through a process called
A. Transpiration Pull
B. Root Pressure
C. Capillary Action
D. Osmosis
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
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 recessive genotype 'aa'?
A. 0.04
B. 0.16
C. 0.24
D. 0.32
Question 6
The diagram below shows the structure of a typical animal cell. Identify the part labeled A.
A. mitochondria
B. lysosome
C. ribosome
D. centriole
Question 7
What is the primary mechanism of asexual reproduction in plants?
A. Budding
B. Fragmentation
C. Spore formation
D. Regeneration
Question 8
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 9
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 10
In the context of evolutionary bio\logy, what is the term for the process by which a population of organisms becomes reproductively isolated from other populations, leading to the formation of new species?
A. Speciation
B. Adaptation
C. Mutation
D. Genetic drift
Question 11
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 12
In a typical vertebrate, the brain is protected by the cranium, which is a derivative of the
A. diencephalon
B. mesencephalon
C. rhombencephalon
D. telencephalon
Question 13
A 1.0 L flask contains 0.3 mol of an ideal gas at 47°C. What is the pressure of the gas?
A. 2.0 atm
B. 3.0 atm
C. 4.0 atm
D. 5.0 atm
Question 14
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 15
In the process of respiration, glu\cose is broken down in the presence of oxygen to produce
A. Carbon dioxide and water
B. Glu\cose and oxygen
C. ATP and NADH
D. Fatty acids and glycerol

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