How are repressible enzymes different from inducible enzymes?

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Solution

Repressible enzymes- Synthesis of these enzymes is suppressed by a metabolite.
Inducible enzymes- Synthesis of these enzymes is induced by a metabolite.
Repressible enzymes Inducible enzymes
1. When a particular metabolite produced in a pathway suppresses or inhibits the production of an enzyme, the enzyme is known as repressible enzyme. 1. When a particular metabolite produced in a pathway further induces the production of an enzyme, the enzyme is known as inducible enzyme.
2. When a metabolite comes and activates the repressors, the genes are switched on. 2. When a metabolite comes and inactivates the repressors, the genes are switched off.
3. They operate in anabolic pathway. 3. They operate in catabolic pathway.
4. Example- tryptophan operon. 4. Example- lac operon

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