3. Adenosine ATP = Adenosine Triphosphate What is it? –E–Energy molecule How store energy? –E–Energy stored in chemical bonds –E–Energy is released when ATP is broken into ADP Why needed? –A–ATP used for cellular activities ATP recreated when ADP + P rejoined PPP Adenosine PPP Energy (heat)

4. Cellular Respiration Who: All eukaryotic cells Purpose: Break food into useable molecules to create ATP 1 glucose = 36 ATP (carbs = preferred source) Exothermic reaction: reaction that releases heat

5. Step 1: Glycolysis In cytoplasm What happens? –Glucose (from our food) is broken down –2 ATP molecules released for use by the cell –Broken pieces of glucose enter mitochondria C C C C C C ATP Mitochondria ADP glucose P P P P P P P

6. Mitochondria Step 2: Aerobic Respiration In mitochondria Two separate processes: Kreb’s cycle & Electron Transport Chain Mitochondria takes in oxygen Oxygen bonds the ADP + P into ATP (up to 36 ATP’s) –CO2 waste created C C C C C C ADP O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 ATP P P P P P P CO2

7. Review 1)Which molecule is the energy molecule of cells? 2)Which types of organisms perform cellular respiration? 3)Where does glycolysis occur? 4)What is broken down in glycolysis? 5)What is created by glycolysis? 6)Where is aerobic respiration performed? 7)Name the 2 subcategories of aerobic respiration. 8)What is the point of aerobic respiration? 9)Which waste is created by aerobic respiration?