Question

1- What is the origin of replication in a
Chrosome ? State
function,​ short note​

Answer 1

It refers to the initiation of replication of a chromosome.

• The initiation of duplication is regulated by a particular DNA sequence known as the orisite.
• In the host body such as a gene, virus or plasmid, foreign DNA linked to the replication origin may replicate and multiply. A single origin suffices for small DNAs, such as bacterial plasmids and small viruses.
• Huge DNAs have multiple origins, and replication begins at each of them. if all replication started at a single origin, then the entire DNA mass would take too long to reproduce.