Temperature

• rate of reaction increases when temperature increases
• • more heat means more kinetic energy, so molecules move faster.
  • makes enzyme more likely to collide with substrate molecules.
  • energy of collisions also increase so collisions are more likely to result in a reaction
  • if temp gets too high the reaction stops
• 1. rise in temp makes enzyme molecules vibrate more
• 2. if temp goes above a certain level, vibrations breaks some of the bonds holding the enzyme in shape
• 3. the active site changes shape and enzyme and substrate no longer fix together
• 4. the enzyme denatures and no longer functions as a catalyst
• label the graph

  A) optimum temp

  B) enzyme is denatured