David Pribnow Studied the Base Sequences of Promoters in Bacteria

question 18

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

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