CBSE 2025 · Region 2 · Set 1 · Q16 · 1 mark
Assertion (A) : Restriction endonuclease recognises palindromic sequence in DNA and cuts them.
Reason (R) : Palindromic sequence has two unique recognition sites PstI and PvuI recognised by restriction endonuclease.
Official answer
From CBSE’s own marking scheme for this paper.
(C)
(A) is true, but (R) is false.
Biotechnology : Principles and ProcessesProcesses of Recombinant DNA TechnologyUnderstandassertion_reasonmedium
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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.