During transcription,the holoenzyme $RNA$ polymerase binds to the $DNA$ strand,and the $DNA$ forms a saddle-like structure at that site. What is this sequence called?

What does the given figure represent?

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

What does $snRNAs$ stand for?

Which of the following is responsible for the transcription of $tRNA$ and $snRNAs$?

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