The Pribnow box is a consensus sequence of $6$ bases,forming a binding site for $E. coli$ $RNA$ polymerase at the promoter.

Which of the following statements are correctly related to the given diagram of transcription?
$(a)$ $A$ is the Coding strand
$(b)$ $A$ is the Non-coding strand
$(c)$ $B$ is the Antisense strand
$(d)$ $B$ is the Sense strand

If one strand of $DNA$ has the nitrogenous base sequence as $ATCTG$,what would be the complementary $RNA$ strand sequence?

The regions located upstream of the $5'$ end and downstream of the $3'$ end of a structural gene are respectively known as:

In the process of transcription, the sigma factor is important for:

During elongation of the polypeptide chain, the sigma factor is