Final answer:
Inducible enzymes are produced by a cell when they are needed and usually require an inducer to trigger their synthesis. Repressive enzymes, on the other hand, are constantly present in the body, irrespective of inducers. Inducible enzymes include invertase, HMG-CoA reductase, and ß-galactosidase, while repressive enzymes include enzymes involved in the urea cycle.
Step-by-step explanation:
An inducible enzyme is one that is produced by a cell when it is needed.
The synthesis of inducible enzymes is typically triggered by an inducer, which is a small molecule that activates the production of the enzyme.
Examples of inducible enzymes include invertase, HMG-CoA reductase, and ß-galactosidase.
A repressive enzyme, on the other hand, is constantly present in the body regardless of the presence of an inducer. These enzymes are constitutive enzymes because they are continuously produced.
Examples of repressive enzymes include enzymes involved in the urea cycle.