The specific DNA sequence which is responsible for initiation of replication is known as:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Origin of replication (ori)
Option (1) Plasmid — Incorrect. A plasmid is a small circular DNA outside the bacterial chromosome, used as a vector. It carries an ori, but it is not itself the sequence where replication begins.
Option (2) Recombinant DNA — Incorrect. It is DNA formed by joining DNA from two different sources.
Option (3) Template DNA — Incorrect. The template is the strand that is copied, not a starting point.
Option (4) Origin of replication (ori) — Correct. Replication starts at the ori, and any DNA linked to it can be copied in the host cell.
NCERT Extract:
Cloning Vectors – …
