$DNA$ transcription unit is defined primarily by three regions in $DNA$ with respect to upstream and downstream ends:

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.

Where is the transcription unit found?

Identify the $INCORRECT$ statement with reference to transcription unit.

Define the following terms: $Cistron$ and $Terminator$.

Assertion: In $\text{RNA}$ processing occurs in Eukaryotes.
Reason: Eukaryotes have split gene.