$A$ segment of $DNA$ coding for a polypeptide,the structural gene in a transcription unit is called . . . . . . .

Match List $I$ with List $II$:

List $I$	List $II$
$A$. $RNA$ polymerase $III$	$I$. snRNPs
$B$. Termination of transcription	$II$. Promoter
$C$. Splicing of exons	$III$. Rho factor
$D$. $TATA$ box	$IV$. snRNAs,tRNA

Choose the correct answer from the options given below:

Identify $a, b$ and $c$ based on the provided image of the transcription process.

What happens during the process of capping in eukaryotic $mRNA$ processing?

$A$: Sigma factor of $RNA$ polymerase recognizes the start signal region in prokaryotes.
$R$: Promoter region lies at $5'$ end of the coding strand, not the template strand.

During transcription,the $DNA$ strand with $3' \rightarrow 5'$ polarity of the structural gene always acts as a template because