What does it mean to say that the most common type of promoter in E.coli is bipartite?
A)The promoter region is divided into two parts which flank the sequence for the gene.
B)There are two separate regions of sequence similarity in the promoter.
C)The sequence of the promoter has dyad symmetry.
D)The promoter must bind two RNA polymerase holoenzymes to transcribe the gene.

Question

Quizplus · Accepted Answer

A bipartite promoter has two regions of sequence similarity, one upstream of the transcription start site and one downstream, which facilitates efficient binding of RNA polymerase to initiate transcription. This is in contrast to a simple promoter where there is only one region of similarity.

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