CBSE 2025 · Region 6 · Set 2 · Q7 · 1 mark
In a DNA, the percentage of thymine is 20. What is the percentage of guanine in it ?
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle 30$%
Molecular Basis of InheritanceThe DNAApplymcqeasy
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CBSE Class 12 Biology past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.