How are repressible enzymes different from inducible enzymes?
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 |