Final answer:
The lac operon is an example of inducible control, with lactose acting as the inducer for transcription. When lactose is present, it prevents the repressor from binding to the operator, allowing transcription of the lac operon. Additionally, when glucose levels are low, CAMP binds to CAP and activates transcription of the lac operon.
Step-by-step explanation:
The lac operon is an example of inducible control in which the presence of lactose "turns on" transcription of the genes for its own metabolism. When lactose is present, it is converted to allolactose which acts as an inducer, preventing the repressor from binding to the operator. The lac operon is also subject to activation. When glucose levels are depleted, cellular ATP is converted into CAMP, which binds to the Catabolite Activator Protein (CAP) and activates transcription of the lac operon.