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Biology · 2026 · 2 marks
Biotechnology : Principles and ProcessesProcesses of Recombinant DNA Technology2 marksUnderstandvery short answer
CBSE 2026 · Region 1 · Set 2 · Q19
Write the importance of following in biotechnology: (a) Ori (Origin of Replication) (b) Enzyme Polymerase used in Polymerase Chain Reaction
Write the importance of following in biotechnology:
(a)
Ori (Origin of Replication)
(b)
Enzyme Polymerase used in Polymerase Chain Reaction
Marking-scheme solution
(a)
Ori ( Origin of replication)- It is a specific DNA sequence responsible for initiating replication /control copy number of linked DNA.
(b)
Polymerase in PCR
Amplification of DNA at high temperature /remains active during high temperature induced denaturation of double stranded DNA/ extension of primers
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CBSE Class 12 Biology past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.