$RNA$ polymerase is involved in

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

Write a short note on the transcription unit.

When a mature $mRNA$ was hybridized to its gene,certain loops were observed. These loops represent:

Which factor is important for termination of transcription?

$A$ mature eukaryotic $m-RNA$ is identified by: