Botany-DNA Replication
NEET Botany DNA Replication MCQ Question
Type: MCQ-numerical-Hard-Class 12
If a double-stranded DNA molecule contains 30% adenine, what percentage of guanine will it contain?
A
20%
B
30%
C
40%
D
35%
Correct Answer
Option A
Detailed Explanation
According to Chargaff's rules, in a double-stranded DNA, the amount of adenine equals thymine, and cytosine equals guanine. If adenine is 30%, thymine is also 30%, leaving 40% for cytosine and guanine together. Thus, guanine is 20%.
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