enzymes

• What are enzymes?

  Biological catalysts produced by all living things
• What are catalysts?


  Substances that speed up chemical reactions
• Enzymes are proteins
• • substrate- reactant which binds to enzyme
  • product- the end result of the reaction
  • active site- substrate fits into active site

  
• ENZYMATIC REACTION STEPS:

  1. substrate approaches active sit
  2. enzyme- substrate complex forms
  3. substrate transformed into products
  4. products released
  5. enzyme recycled
• Examples:

  maltose -----> glucose

  sucrose -----> glucose + fructose

  lactose -----> glucose + galactose

  peptides ------> amino acids

  proteins ------> peptides

  lipids --------> fatty acids and glycerol

  starch -------> maltose
• Examples of enzymes: