Chemistry GCSE

• What do Enzymes do at higher temperatures

  Bonds holding enzymes start to break down

  The shape of active site changes → substrate no longer fits

  Enzyme is denatured
• How is Enzyme Activity affected by pH


  Graph

  
• Why do different digestive Enzymes have different optimum pH conditions?

  Because they depend on their environmental conditions, and they work better at different conditions
• Chemical Digestion - Stomach Acid


  Provides pH environment for enzymes

  Kills bacteria in food
• Chemical Digestion - Bile

  Not an enzyme

  Produced in liver and stored in gallbladder

  Released into the small intestine

  Alkaline to neutralise acid in food from stomach
• One of the properties of Bile

  Emulsifies fats by breaking down large globules of fats into smaller globules