effect of temperature and ph on enzymes

• What is the effect of temperature on enzyme activity?

  Temperature affects the rate of enzyme reactions
• What is the role of enzymes in chemical reactions?

  Enzymes speed up chemical reactions
• What is the groove on an enzyme's surface called?

  Active site
• What is a substrate in relation to enzymes?

  Substrate is the molecule that enzymes react with
• What does the lock and key theory explain?

  It explains enzyme specificity
• How does increasing temperature affect enzyme activity?

  It increases the reaction rate until optimum
• What is the optimum temperature for most human enzymes?

  37 degrees Celsius
• What happens to enzyme activity when temperature exceeds the optimum?

  Enzyme activity rapidly decreases to zero
• What does it mean when an enzyme's active site is denatured?

  The shape of the active site changes
• What is the effect of pH on enzyme activity?

  pH affects the rate of enzyme reactions
• What is the optimum pH for an enzyme?

  It is where enzyme activity is maximum
• What happens to enzyme activity in extreme pH conditions?

  Activity drops to zero due to denaturation
• Which enzyme works best at an acidic pH?

  Protease enzyme in the stomach
• What are the effects of temperature and pH on enzyme activity?

  • Temperature increases reaction rate until optimum
  • Optimum temperature for human enzymes is 37°C
  • High temperatures denature enzymes
  • pH affects enzyme activity
  • Each enzyme has a specific optimum pH
  • Extreme pH conditions denature enzymes
• Which enzyme works best at an alkaline pH?

  Lipase enzyme from the pancreas
• What should you expect in exam questions regarding enzymes?

  • Effects of temperature on enzyme activity
  • Effects of pH on enzyme activity
  • Specific examples of enzymes and their conditions