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In the lac operon, the structural genes are switched off when

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In the lac operon, the structural genes are switched off when
A. Repressor binds to poerator
B. Repressor binds to promotor
C. Repressor binds to regular
D. Repressor binds to inducer
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a) A short sequence of DNA where the repessor binds preventing RNA polymerase from attaching to the promoter this is called on/off switch of transcription.
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