Answer :
True - The structural genes cannot be translated by RNA polymerase when the repressor binds to the operator.
Several repressors permit RNA polymerase to attach to the promoter simultaneously, but they obstruct the succeeding steps of the initiation process, ultimately preventing transcription start.
The operator gene attaches to the repressor, which stops it from starting the synthesis of the protein required by the operon. The operon is either turned on or off depending on the presence or absence of specific repressor molecules.
High tryptophan levels allow the trp repressor to transform into its active (DNA-binding) form by binding to it. In order to prevent RNA polymerase from attaching to the promoter and stopping transcription of the operon, the tryptophan-bound trp repressor connects to the operator.
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