Zoology-Nucleic Acids
NEET Zoology Nucleic Acids MCQ Question
Type: MCQ-numerical-Hard-Class 11
If a nucleic acid sample contains 30% adenine, what percentage of cytosine should be expected in the sample assuming it is double-stranded?
A
20%
B
30%
C
40%
D
50%
Correct Answer
Option A
Detailed Explanation
In a double-stranded DNA, the amount of adenine equals thymine, and the amount of cytosine equals guanine. If adenine is 30%, thymine is also 30%, leaving 40% for cytosine and guanine combined. Thus, cytosine would be 20%.
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