Which enzyme is used for transcription?

Choose the correct option for $hnRNA$.

The sequence of nitrogen bases in a portion of a coding segment of $DNA$ is $AAT GCT TAG GCA$. What will be the sequence of nitrogen bases in the corresponding region of the transcripted $mRNA$?

The process of synthesis of $m-RNA$ from $DNA$ is called ......

Which of the following statements are correct?
$(i)$ From one molecule of $\text{DNA}$,several molecules of $\text{RNA}$ can be formed.
$(ii)$ The $\text{RNA}$ forming part is known as the translational unit.
$(iii)$ The promoter is located at the $5'$ upstream end.
$(iv)$ The promoter and terminator flank the structural gene in a transcription unit.

Which of the following statements is incorrect for the process of transcription?