Effect of temperature and ph on enzymes

• What happensto the enzymes when we increase the temperature ?

  the activity of the enzymes increases (the reaction is faster )
• Why does the activity of enzymes increase with temperature ?


  the substrate are moving faster so there is more collision per second
• What is the optimum temperature ?

  when there is certain temperature and the enzymes are working at the fastest rate
• What happens at the optimum temperature?


  there is maximum frequency of succesful collision
• What is the optimum temperature for human enzymes ?

  37 degree celcius
• What happens when we increase the optimum temperature ?


  the activity rapidly decreases to zero
• What happens to the enzymes at high temperatures ?

  the enzymes molecules vibrate and change the shape of the active site
• What does it mean when the active site is 'denatured '?

  when the substrate no longer fits the active site because of high temperatures
• what happens when you make the pH more acidic or alkaline ?

  the enzyme activity drops
• What enzyme would work best for the stomach ?

  acidic pH
• What enzyme would work best for the pancreas into the small intestine ?

  alkaline pH