Which enzyme plays an important role in transcription?

$RNA$ splicing, capping and tailing occurs in . . . . . . of the cell.

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

During transcription,the $DNA$ strand which acts as a template is called $A$ strand and it has $B$ polarity.

What do the processes $1$ and $2$ represent in the following sequence?
$TAC \, AAG \, GCG \, AUA \, CGA$
$\downarrow (1)$
$AUG \, UUC \, CGC \, UAU \, GCU$
$\downarrow (2)$
$Met - Phe - Arg - Tyr - Ala$

What sequence on the template strand of $DNA$ corresponds to the first amino acid inserted into a protein?