NURSING ANM AND GNM

Detailed explanation-1: -If an inducer, a molecule that initiates the gene expression, is present, then it can interact with the repressor protein and detach it from the operator. RNA polymerase then can transcribe the message (expressing the gene).

Detailed explanation-2: -Monod studied how organisms, such as E. coli, created enzymes, while Jacob investigated how genes regulated the production of those enzymes. To better explain the action of enzymes in bacteria, Jacob and Monod collaborated with each other and with Pardee.

Detailed explanation-3: -The repressor does bind to the operon really tightly, but, in the absence of lactose, it will occasionally dissociate. This allows the transcription of lactose permease, so that lactose may enter the cell and induce the system for a more prolonged length of time.

Detailed explanation-4: -When the repressor binds to the operator, it prevents RNA polymerase from binding to the promoter and/or transcribing the operon. When the repressor is bound to the operator, no transcription occurs and no mRNA is made.