The statement should read;
"An operon is a cluster of genes in E coli. These genes make proteins that work together in one metabolic pathway. An operon is able to respond to changes in the environment. The operator is a segment of DNA that acts as a switch for transcription, turning the operon on or off. When the operon is on, [RNA polymerase] binds to the promoter and transcribes the DNA. When the operon is off, a repressor blocks transcription."
What more should you know about an operon?
Operons are fundamental units of gene regulation in prokaryotes, such as bacteria.
They play a crucial role in coordinating the expression of genes involved in the same biological pathway, ensuring that these genes are transcribed and translated together in response to specific environmental cues.
The activity of an operon is controlled by the interaction between the repressor and the operator.