Segments of $mRNA$ removed during splicing are called......

The main enzyme for transcription is .....

Match the following $RNA$ polymerase enzymes with their transcribed products:

$(a) \; RNA$ polymerase $I$	$(i) \; tRNA$
$(b) \; RNA$ polymerase $II$	$(ii) \; rRNA$
$(c) \; RNA$ polymerase $III$	$(iii) \; hnRNA$

Select the correct option from the following:

The sequence of nitrogen bases in a portion of a coding segment of $DNA$ is $AAT GCT TAG GCA$. What will be the sequence of nitrogen bases in the corresponding region of the transcripted $mRNA$?

$DNA$ transcription unit is defined primarily by three regions in $DNA$ with respect to upstream and downstream ends:

Eukaryotic $RNA$ polymerase $III$ catalyzes the synthesis of