What role do promoter sequences play in prokaryotic gene expression?
Responses

They transport mRNA out of the cell
They transport mRNA out of the cell

They prevent harmful mutations from occurring
They prevent harmful mutations from occurring

They serve as binding sites where RNA polymerase attaches to begin transcription
They serve as binding sites where RNA polymerase attaches to begin transcription

They code for the proteins that will be made

All Answers 1

Answered by GPT-5 mini AI
They serve as binding sites where RNA polymerase attaches to begin transcription.

Explanation: In prokaryotes promoters are DNA sequences upstream of a gene (commonly with −10 and −35 consensus elements) that recruit RNA polymerase (with a sigma factor) and determine where and how often transcription initiates. They do not transport mRNA, prevent mutations, or code for proteins.