Q. 6.  The promoter site and the terminator site for transcription are located at

(a) 3' (downstream) end and 5' (upstream) end, respectively of the transcription unit

(b) 5' (upstream) end and 3' (downstream) end,  respectively of the transcription unit

(c) the 5' (upstream) end

(d) the 3' (downstream) end 


(c). The promoter is the binding site for RNA polymerase for initiation of transcription.
The promoter is located towards 5'-end (upstream) of the structural gene of coding strands and provides the binding site for RNA polymerase.