Which of the following $RNAs$ is not required for the synthesis of protein?
$\mathrm{mRNA}$
$tRNA$
$\mathrm{rRNA}$
$siRNA$
Name the enzyme that facilitates opening of $DNA$ helix during transcription.
What is correct for bacterial transcription?
Formation of $RNA$ strand on template $DNA$ is
A transcription unit in $DNA$ is defined primarily by the three regions in $DNA$ and these are with respect to upstream and down stream end;