CBSE 2026 · Region 3 · Set 3 · Q3 · 1 mark
What does I in restriction enzyme Hind $\displaystyle \mathrm{S}_{2} \mathrm{I}$ indicate ?
Official answer
From CBSE’s own marking scheme for this paper.
(B)
It is the first enzyme isolated from strain $\displaystyle \mathrm{S}_{2}$ of bacterium.
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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.