CBSE 2026 · Region 1 · Set 2 · Q10 · 1 mark
Messelson and Stahl's experiment carried out centrifugation in $\displaystyle \mathrm{CsCl}_{2}$ density gradient to separate:
Official answer
From CBSE’s own marking scheme for this paper.
(D)
Normal DNA from heavy DNA
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CBSE Class 12 Biology past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.