Enzymes

• Examples of anabolic reactions (building up of complex substances)

  • Protein synthesis
  • photosynthesis
• Examples of catabolic reactions (breaking down of complex substances)

  • cellular respiration
  • digestion
  • decomposition of hydrogen peroxide
• Characteristics of enzyme

  1. Speed up the rate of chemical reaction without being chemically changed
  2. Specific in action
  3. Required in minute amounts
  4. Affected by temperature pH
  5. Catalysing reversible directions
• pH graph

  
• Temperature graph

  
• Functions of enzyme

  1. Digest large food molecules into smaller molecules
  2. Breaking down food substances in cells to release energy
  3. Building up or synthesising complex substances
  4. Breaking down toxic substances in cells