Botany-DNA Structure
NEET Botany DNA Structure MCQ Question
Type: MCQ-numerical-Easy-Class 12
If a DNA molecule contains 20% adenine, what is the percentage of guanine in the molecule?
A
20%
B
30%
C
40%
D
60%
Correct Answer
Option B
Detailed Explanation
According to the base pairing rule, adenine pairs with thymine and guanine pairs with cytosine. If adenine is 20%, then thymine is also 20%, making up 40% of the DNA. The remaining 60% is divided equally between guanine and cytosine, so guanine is 30%.
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