alleryThe true intracellular inducer of the lac operon is:
AGlucose
BGalactose
CLactose itself
DAllolactose
Answer & Solution
Correct answer: D. Allolactose
Allolactose (an isomer of lactose) is the true inducer
it inactivates the lac repressor encoded by i.
The z gene encodes beta-galactosidase, which hydrolyses lactose into glucose plus galactose.
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