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%.

Found an issue with this question?