Which of the following statements about repressors is TRUE? Multiple Choice A repressor is a carbohydrate that binds to an operator site on DNA and prevents transcription. A repressor is a protein that binds to an operator site on RNA and prevents transcription. A repressor is a protein that binds to an activator-binding site and prevents transcription. Repressors attach to corepressor, changing their shape to they longer attoch to the operator. A repressor is a protein that binds to an operator site on DNA and prevents transcription..