What is the sequence of mRNA if the sequence of the coding strand in a transcription unit is written as $5'-ATGCATGCA-3'$?

The main enzyme for transcription is .....

Which form of $RNA$ is most heterogeneous?

The process of transcription follows which principle?

Which of the following statements about $RNA$ polymerase are correct?
$i. \;RNA\; \text{polymerase } I \text{ transcribes } rRNAs.$
$ii. \;RNA \; \text{polymerase } II \text{ transcribes } snRNAs.$
$iii. \;RNA \; \text{polymerase } III \text{ transcribes } hnRNA.$
$iv. \;RNA \; \text{polymerase } II \text{ transcribes } hnRNAs.$

At which site does the process of transcription terminate?