Posted: July 25th, 2017

Which of the following statements correctly describes promoters in E. coli?

Which of the following statements correctly describes promoters in
E. coli?
A. All promoters have the same sequence, which is that recognized by
RNA polymerase holoenzyme.
B. Every promoter has a different sequence, with little or no
resemblance to other promoters.
C. Many promoters are similar and resemble a consensus sequence, which
has the highest affinity for RNA polymerase holoenzyme.
D. A promoter may be present on either side of a gene or in the middle
of it.
E. Promoters are not essential for gene transcription, but they can
increase transcription by two- to threefold