The segments of DNA where transcription begins have a binding site for RNA polymerase.These segments are known as
A)sigma.
B)the holoenzyme.
C)initiation factors.
D)promoters.

Question

Quizplus · Accepted Answer

The segments of DNA where transcription begins have a binding site for RNA polymerase. These segments are called promoters. Therefore, choice D is the best answer. Sigma is a subunit of RNA polymerase that helps in recognizing the promoter sequence. The holoenzyme is the complete RNA polymerase enzyme consisting of core enzyme and sigma subunit. Initiation factors are proteins that help RNA polymerase to bind to the promoter sequence. However, none of these choices describe the segments of DNA where transcription begins.

The Segments of DNA Where Transcription Begins Have a Binding