Segments of $mRNA$ removed during splicing are called......

Which of the following is not a part of a transcription unit?

Which of the following statements are correct with reference to the prokaryotic genome?
$A$. Monocistronic structural genes
$B$. Introns absent in structural genes
$C$. Transcription and translation are coupled processes
$D$. Primary transcript undergoes splicing
$E$. Only one $RNA$ polymerase is present

Removal of $RNA$ polymerase $I$ from nucleoplasm will affect the synthesis of

Prokaryotic transcription mechanism requires the involvement of only one polymerase type and:
$(a)$ It occurs in the cytoplasm only.
$(b)$ It is often coupled with translation.
$(c)$ It does not require splicing but capping is essential.

Select the appropriate option for the coding sequence (expressed sequence).