CBSE 2025 · Region 6 · Set 3 · Q12 · 1 mark
The cloning site present in the ampicillin resistance gene of E. coli cloning vector pBR322 is :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
Pst I
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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.