Enzymes are Proteins Catalysts (speed up chemical reactions)
Enzymes can either Breakdown substrates into products »or Assemble substrates into products
The enzyme catalase is found in cells H2O2 + catalase H20 + O2+ heat+catalase Produced in the body and too much is harmful Water + oxygen
Enzymes Can be denatured by changes in environmental conditions Denaturing makes the enzyme not work
Where is Catalase Found? 1. Carefully place a small quantity of each material in a well. 2. Add 5-10 drops of H 2 O 2 to each well and record observations. 0 - no bubbling 1- small bubble formation 2- fast bubble formation 3- very fast bubble formation
Part II: What Effect Does Heat Have on Enzyme Function?
Part III: Does acid destroy an enzyme’s ability to speed up a chemical reaction? GroupReaction rate Control (water) Experimental (lemon juice)
Part IV: Can an enzyme be used up or reused? 1. Carefully place a small amount of liver in a test tube 2. Add 5ml of hydrogen peroxide 3. Record reaction rate (0-5) 4. Pour off liquid and leave the liver 5. Add 5 ml of hydrogen peroxide 6. Record reaction