enzymes

• factors influencing enzyme action

  temperature and pH
• when the temperature of enzymes is high, the rate of reaction slows down (indirectly proportional relationship)
• what is the optimal body temp?

  37 degrees
• extreme temperatures permanently destroy enzyme structure
• when the temperature of enzymes is low, the rate of reaction slows down/stops (directly proportional relationship)
• if temperature increases, rate if reaction increases
• enzymes are biological catalysts
• catalysts speed up the rate of reaction
• enzymes are unchanged by the reaction they catalyse
• enzymes can be reused, constantly binding to next substrate
• enzyme process

  lock (enzyme) & key(substrate-material that will undergo reaction)

  substrate joins to the active site

  reaction takes place to form a product

  product leaves the enzyme and the enzyme can be used again