How would lac operon operate in E.coli growing in a culture medium where lactose is present as source of sugar?  

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In E.coli growing in a culture medium where lactose is present as a source of sugar, the lac operon operates as follows: Lactose serves as an inducer, binding to the lac repressor protein and causing it to undergo a conformational change. This change prevents the repressor from binding to the operator...
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In E.coli growing in a culture medium where lactose is present as a source of sugar, the lac operon operates as follows: Lactose serves as an inducer, binding to the lac repressor protein and causing it to undergo a conformational change. This change prevents the repressor from binding to the operator region, allowing RNA polymerase to bind to the promoter and initiate transcription of the lac operon genes. read less
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