In capping,.......... is added to the $5'$ end of $hnRNA$.

Explain (in one or two lines) the function of the following:
$(a)$ Promoter
$(b)$ $tRNA$
$(c)$ Exons

What initiation and termination factors are involved in transcription in Eukaryotes?

Given below is the sequence of the coding strand of $DNA$ in a transcription unit: $5' - AATGCAGCTATTAGG - 3'$. Write the sequence of $(a)$ its complementary strand and $(b)$ the $mRNA$.

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:

$mRNA$ is formed by