Here's why:
* Operon: A group of genes that are transcribed together as a single mRNA molecule, usually involved in a related metabolic pathway.
* Operator: A short DNA sequence located within the operon, usually adjacent to the promoter.
* Repressor: A protein that binds to the operator and blocks the transcription of the genes in the operon.
By binding to the operator, the repressor prevents RNA polymerase from binding to the promoter and initiating transcription. This is how the repressor regulates gene expression.
