1. when reactions don’t happen fast enough… Your body calls in

2. What are enzymes?  proteins  speed up chemical reaction (catalyst)  located in cells

3. require some activation energy to start breaking bonds All Chemical Reactions

4.  to lower the activation energy of the reaction therefore speeding it up Role of Enzymes Example: carbonic anhydrase CO 2 + H 2 O  H 2 CO 3 Converts Carbon Dioxide to Carbonic Acid 10 million times faster than on its own

6. Enzyme brings substrates close together for the reaction to occurs & make the product. Substrate- Enzyme Complex Active Site is where the substrate bonds to the enzyme

8. ENZYMESUBSTRATE  CarbohydraseCarbohydrate  MaltaseMaltose  AmylaseStarch  ProteaseProtein  LactaseLactose  LipaseLipids

9.  Changes shape around/ hug the substrate ◦ The tight fit puts stress on the substrate increasing the reaction rate.  Can build or break apart molecules  Are reusable  Can be turned ON or OFF by regulatory molecules  Have an ideal pH & temperature they like to work at ◦ Can be denatured (fall apart) due to changes in temperature & pH SONG… lucky you SONG