The Effect of Temperature and pH on Enzymes

• What is the effect of temperature on enzyme activity?

  Temperature affects the rate of enzyme reactions
• What happens to enzyme activity as temperature increases?

  Enzyme activity increases until optimum temperature
• What is the optimum temperature for most human enzymes?

  37 degrees Celsius
• What occurs when the temperature exceeds the optimum for an enzyme?

  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 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
• Which enzyme works best at an alkaline pH?

  Lipase enzyme from the pancreas
• What are the effects of temperature and pH on enzyme activity?

  • Temperature increases enzyme activity until optimum
  • Optimum temperature for human enzymes is 37°C
  • High temperatures denature enzymes
  • pH affects enzyme activity with specific optimum pH
  • Extreme pH conditions denature enzymes