More on enzymes

changing the temperature changes the rate of an enzyme- catalysed reaction
1. a higher temperature increases the rate at first
  1. more heat means the enzymes and the substrate particles have more energy - making the enzymes and the substrate particles move about more - more likely to meet up and react - higher collison rate
    1. low temperatures have the opposite effect - lower collision rate and slower reaction
if it gets too hot, some of the bonds holding the enzyme together will break
1. making the enzyme lose its shape - active site doesn't fit with the substrate
  1. reaction can't catalysed and stops - enzyme doesn't function
enzymes like the right pH too
1. pH has an effect on the enzymes
  1. pH is too high or too low - interferes with the bonds holding the enzymes together
    1. changing the shape of the active site and substrate
      1. enzyme = denatured = irreversible
        all enzymes have an optimum pH that they work best at
        often neutral pH7
each enzyme has its own optimum temperature when the reaction is fastest
1. temp before it gets too hot and starts to denature
  1. uman optimum temp = 37
Q10 values show how rate of reaction changes with temp
1. how much the rate changes when the temp is raised by 10`c
  1. rate at higher temp/rate at lower temp

Resource summary

	Created by pwincess_sana97 over 12 years ago