There are special proteins that help to open up $DNA$ double helix in front of the replication fork. These protein are
$DNA$ ligase
$DNA$ gyrase
$DNA$ polymerase $I$
None of these
Micrococcas nuclease enzyme
When one or more genes are missing from middle part of chromosome, it is called
Dominance of $RNA$ world is proved by
Barbara McClintock is famous for her work on
Which one of the following is not a process of $DNA$ replication