CBSE 2025 · Region 7 · Set 1 · Q21 · 2 marks
The two strands in DNA are not identical but complementary. Explain. What products would be formed when DNA is hydrolysed ?
Marking-scheme solution
Because the hydrogen bonds are formed between specific pairs of bases
$\displaystyle 2$-deoxyribose sugar , base and phosphoric acid
BiomoleculesNucleic AcidsUnderstandvery_short_answermedium
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CBSE Class 12 Chemistry past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.