Length of $DNA$ in $E$. coli is
$2.2\; m$
$1.36\; mm$
$1.36\; m$
$3.4\; m$
Histones are rich in
Genes of interest can be selected from a genomic library by using
Plasmids are composed of
Dominance of $RNA$ world is proved by
A characteristic showing continuous variation is controlled by a