Question: why is the operon said to be an inducible operon?
Answer: Why is the lac operon said to be an inducible operon? When allolactose is present, it induces the inactivation of the lac repressor. The lac repressor keeps the production of lactose-digesting enzymes turned off. ... When taken up by a cell, it binds to a repressor so that the repressor no longer binds to the operator.