1. Chemical Reactions and enzymes

2. When you bring two atoms together, what happens? Oxygen O2

3. What process happened to create the oxygen molecule?

4. What if no reaction happens?

5. O2 +H2 = H2O Reactants Products Chemical equation

6. Rules Limited to the number of atoms you start with You can only rearrange to form new compounds Why is this true?

7. Enzymes- biological molecules

8. Inside your body are many chemical reactions happening all the time. Digestion Metabolism Cellular respiration Reproduction Growth And many more

9. Catalyst- a molecule that speeds up the rate of chemical reactions by lowering the activation energy Enzymes are catalysts Consider carbonic anhydrase CO2 + H2O = H2CO3 The enzyme speeds up the reaction by a factor of 10 million They complete their job by lowering the activation energy

10. Energy

11. How does it work?

12. Regulation of enzymes. Temperature pH Regulatory molecules