A normal metaphase chromosome with a midial centromere is
Metacentric
Sub-metacentric
Acrocentric
Telocentric
In eukaryotes, the $RNA$ polymerase that synthesises $tRNA$ is $RNA$ polymerase ______ and is also responsible for formation of ______ $rRNA$.
An inactive repressor produced by regulator gene that does not block the operator site in the tryptophan Operon is called
The human chromosomes are divided into $7$ groups, $B$-chromosomes are
$DNA$ is methylated at
Histones are rich in