Which is incorrect about inducible operons?

Question

Quizplus · Accepted Answer

Inducible operons are turned off in the absence of a specific substrate, and are turned on when that substrate is present. They are often involved in catabolic pathways, where enzymes are needed to break down complex molecules into simpler ones. The buildup of end products is actually a mechanism for repressing the operon, not inducing it, and is characteristic of repressible operons. The lac operon is an example of an inducible operon, turned on by the presence of lactose in the environment.

Which Is Incorrect About Inducible Operons