In the processing of $hnRNA$ in eukaryotic cells,the primary transcripts are processed in the following sequence.

The removal of introns and joining of exons is known as.......

$RNA$ polymerase $II$ transcribes which type of $RNA$?

$mRNA$ is formed by

Which of the following statements are correct?
$i. r-RNA$ provides the template for synthesis of proteins.
$ii. t-RNA$ brings amino acids and reads the genetic code.
$iii. RNA$ polymerase binds to promoter and initiates transcription.
$iv. A$ segment of $DNA$ coding for a polypeptide is called an intron.

The enzyme responsible for transcription is .....