Part b - regulation of model operons the trp and lac operons are regulated in various ways. how do bacteria regulate transcription of these operons

Answer: Operon is not transcribed: lac operon: lactose absent; trp operon: tryptophan present Operon is transcribed, but not sped up by the positive control: trp operon: tryptophan absent, lac operon: lactose present, glucose present Operon is transcribed quickly through postive control: lac operon: lactose present, glucose absent