What is the function of a promoter site on DNA?
Correct Answer: Initiates transcription
Description: Promoter sites are initiation sites for transcription. Transcription stas when RNA polymerase binds to the promoter. It then unwinds the closed promoter complex, where DNA is in the form of a double helix, to form the open promoter complex in which about 17 base pairs of template DNA are unwound. RNA synthesis then begins with either a pppA or a pppG inseed at the beginning 5'-terminus of the new RNA chain, which is synthesized in the 5' to 3' direction. Ref: Weil P. (2011). Chapter 36. RNA Synthesis, Processing, & Modification. In D.A. Bender, K.M. Botham, P.A. Weil, P.J. Kennelly, R.K. Murray, V.W. Rodwell (Eds),Harper's Illustrated Biochemistry, 29e.
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