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Inducible operons are usually switched off. This is a type of operon which is switched on when a chemical called inducer is present. The inducer is almost always a substrate.

1. True
2. False
3. Partially true
4. None of these

Correct answer: True

Solution

Inducible operons are typically switched off in the absence of an inducer, which is often a substrate for the operon's product. When the inducer is present, it binds to the repressor protein, preventing it from binding to the operator and allowing transcription to occur.

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