Category: Everyday Science | Last updated: 2026-09-18

The lac operon is induced by:

A) Glucose
B) Lactose (specifically allolactose), which binds and inactivates the repressor
C) Tryptophan
D) ATP

Explanation

Allolactose binds the lac repressor, causing it to release from the operator. RNA polymerase can then transcribe the operon.

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