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
The salivary gland chromosomes in the dipteran larvae, are useful in gene mapping because
Human diploid cell contains ............ bp.
Hereditary element may be attached to chromosome or found free in cytoplasm is called
Balbiani rings are found in ……
The bacterium used in Griffith’s experiment was