Enzymes
Are biological catalysts made of proteins. They alter the rate of chemical reactions without being chemically changed at the end of reaction and are specific nature.
Enzyme-Catalysed Reaction:
Characteristics of Enzymes:
Factors affecting Enzyme Activity:
pH: they work best at optimum pH. As pH moves away from the pH scale the rate of reaction decreases. A change in pH causes the shape of active site to change.
Temperature: works best at optimum temperature. At a temperature above optimum temperature the enzyme denatures.
Enzyme and Substrate concentration: as the substrate concentration increases the rate of reaction increases to an initial point to make reaction constant + Increase in enzyme concentration increases rate of enzyme reaction.
Lock and Key hypothesis: