I. Introduction
- Enzymes play a crucial role in proper cell functioning
- Enzymes have a limited lifespan and need to be replaced
- Degradation and recycling of enzymes by protein-degrading systems pose a challenge to the cell
- Housekeeping enzymes are continuously needed and present in the cell
II. Regulation of Housekeeping Enzymes
- Constitutive expression of housekeeping enzyme genes
- Importance of maintaining proper levels of housekeeping enzymes
III. Regulation of Inducible Enzymes
- Inducible enzymes are only needed at specific times or in certain environments
- Examples of inducible enzymes, such as b-galactosidase
- Regulation of inducible genes to conserve cellular resources
IV. Regulation of Repressible Enzymes
- Repressible enzymes are required for biosynthesis and only present when needed
- Examples of biosynthetic pathways that use repressible enzymes
- Inhibition of biosynthesis by end products to conserve cellular resources
V. Conclusion
- Enzyme synthesis is regulated to conserve cellular resources
- Housekeeping enzymes are continuously present, while inducible and repressible enzymes are regulated based on specific needs in cellular pathways.
