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1) A double-stranded RNA genome isolated from a virus in the stool o f a child
with gastroenteritis was found to contain 15% uracil. What is the percentage
of guanine in this genome?
A. 15
B . 25
c. 35
D. 75
E. 85
Please give explanations with your answers. Thank you
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agree wd ur concept @ jaz
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And the winner is jazpreet!
Correct answer is C
Explanation: Chargaff's Rules
In dsDNA (or dsRNA)
% A=% T (% U)
% G=% C
% purin es = % pyrimidines
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2) A medical student working in a molecular biology laboratory is asked by
her mentor to determine the base composition of an unlabeled nucleic acid
sample left behind by a former research technologist. The results of her analysis
show 10% adenine, 40% cytosine, 30% thymine and 20% guanine. What
is the most likely source of the nucleic acid in this sample?
A. Bacterial chromosome
B. Bacterial plasmid
C. Mitochondrial chromosome
D. Nuclear chromosome
E. Viral genome
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E-most likely a single stranded virus
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Single stranded DNA virus?
