You lead a research team challenged with the task of creating a regulatory protein able to shut off transcription of a particular gene. You focus your design around a binding site called an operator that is associated with the promotor. The physical location of the operator most likely to affect transcription would be

A. downstream of the gene promoter.
B. internal to the gene itself.
C. upstream of the gene promoter.
D. internal to the gene promoter.


Answer: A

Biology & Microbiology

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