1. + Intro to Biochemistry Bio “Life” + Chemistry “Chemical Reactions” = The study of chemical reactions in living things.

2. + Why Biochemistry? One characteristic of living things: life depends on chemical reactions! ENERGY These are the principle energy reactions of life! (It’s a cycle!) chemical reactions

3. + Chemical Reactions Breaking Down, Building up or Recombining matter Requires Reactants & Products

4. + Chemical Reactions What goes in What gets produced (the result) Breaking Down, Building up or Recombining matter Requires Reactants & Products

5. + Metabolism We eat food to take in the materials that will be the REACTANTS in our body’s metabolic reactions Through these metabolic reactions, food is broken down into smaller molecules As this happens, ENERGY is released! Chemical reactions depend on the atoms involved.

6. + Atoms and Elements Atom: smallest unit of matter that has the same defined properties This is an ATOM

7. + Atoms and Elements Atom: smallest unit of matter that has the same defined properties Element: substance made of only one type of atom This is an ATOM

8. + Atoms and Elements Atom: smallest unit of matter that has the same defined properties Element: substance made of only one type of atom 6 Common elements in living organisms This is an ATOM

9. + Atoms and Elements Atom: smallest unit of matter that has the same defined properties Element: substance made of only one type of atom 6 Common elements in living organisms Carbon This is an ATOM

10. + Atoms and Elements Atom: smallest unit of matter that has the same defined properties Element: substance made of only one type of atom 6 Common elements in living organisms Carbon Hydrogen This is an ATOM

11. + Atoms and Elements Atom: smallest unit of matter that has the same defined properties Element: substance made of only one type of atom 6 Common elements in living organisms Carbon Hydrogen Nitrogen This is an ATOM

12. + Atoms and Elements Atom: smallest unit of matter that has the same defined properties Element: substance made of only one type of atom 6 Common elements in living organisms Carbon Hydrogen Nitrogen Oxygen This is an ATOM Top 4!

13. + Atoms and Elements Atom: smallest unit of matter that has the same defined properties Element: substance made of only one type of atom 6 Common elements in living organisms Carbon Hydrogen Nitrogen Oxygen Phosphorus This is an ATOM Top 4!

14. + Atoms and Elements Atom: smallest unit of matter that has the same defined properties Element: substance made of only one type of atom 6 Common elements in living organisms Carbon Hydrogen Nitrogen Oxygen Phosphorus Sulfur Top 4! This is an ATOM

15. + Atoms contain 3 types of subatomic particles ProtonsNeutronsElectrons LocationNucleus Charge +

16. + Atoms contain 3 types of subatomic particles ProtonsNeutronsElectrons LocationNucleus Charge + Neutral

17. + Atoms contain 3 types of subatomic particles ProtonsNeutronsElectrons (on the Exterior) LocationNucleus Energy clouds surrounding the nucleus  called shells Charge + Neutral -