NEET Zoology Nucleic Acids MCQ Question
If a nucleic acid sample contains 30% adenine, what percentage of cytosine should be expected in the sample assuming it is double-stranded?
20%
30%
40%
50%
Correct Answer
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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