David Pribnow Studied the Base Sequences of Promoters in Bacteria

Multiple Choice

David Pribnow studied the base sequences of promoters in bacteria and bacterial viruses. He found two conserved regions in these promoters the - 10 box and the - 35 box) . What is the function of these two regions of the promoter?

A) They signal the initiation site.
B) They separate the two DNA strands.
C) They bind the sigma subunit that is associated with RNA polymerase.
D) They attach the correct nucleotide triphosphate to the template DNA strand.