Botany-DNA Replication
NEET Botany DNA Replication MCQ Question
Type: MCQ-numerical-Easy-Class 12
If a double-stranded DNA molecule contains 30% adenine, what is the percentage of cytosine present in this DNA molecule?
A
20%
B
30%
C
40%
D
50%
Correct Answer
Option A
Detailed Explanation
According to Chargaff's rule, adenine pairs with thymine and cytosine pairs with guanine. If adenine is 30%, thymine is also 30%. This leaves 40% for cytosine and guanine combined, meaning cytosine is 20%.
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