The ZYA region of the lac operon will be maximally expressed if:
When the cAMP levels are low- there is no binding of CAP to CAP site. | No ourable interaction for RNA polymerase. | Lac operon is not expressed. - option a is excluded. When glucose is available, Lac operon is not expressed Attenuation is seen in tryptophan operon, not Lac operon For optimal expression of lac operon, The CAP site should be occupied the operator site should be free of repressor.
Cyclic AMP levels are low
Glucose and lactose are both available
The attenuation stem-loop is able to form
The CAP site is occupied and the operator site is free
Basics of genetics