What is the role of the repressor?
Blocks RNA polymerase
Enhances RNA polymerase
Silences RNA polymerase
Activates RNA polymerase
Answer
Blocks RNA polymerase. The repressor is a protein that binds to the operator region of a gene, preventing RNA polymerase from binding and initiating transcription. This blocks the expression of the gene, which is typically involved in a metabolic pathway. When the repressor is bound to the operator, it undergoes a conformational change that blocks the binding of RNA polymerase.
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