Enzymes are specialized proteins that catalyze chemical reactions in cells by fitting specific substrate molecules into their active sites. The substrate fits precisely into the enzyme's active site, allowing the enzyme to catalyze the reaction. If an enzyme is heated beyond its optimal temperature or exposed to certain chemicals, it can undergo denaturation where its shape is permanently changed, preventing it from functioning properly to catalyze reactions.

2. Enzymes are substrate specific due to the “fit” at the active site of the enzyme. Enzyme sucrase will catalyze this reaction

3. Catalytic cycle of a enzyme

4. Factors influence rate of enzyme reactions Do all enzymes require the same condition? What happens when enzymes are heated beyond optimal temperatures?

5. Denaturation occurs at high temperatures or various chemical treatments. Shape maybe permanently changed. How will denaturation effect the functioning of the protein?