1. Cellular Respiration Glycolysis + Anaerobic or Aerobic Processes

2. Glycolysis First step of cellular respiration Occurs in the cytoplasm [Cytosol] Net Yield = 2 ATP What about the pyruvic acid?

3. If no oxygen…then Fermentation! Lactic Acid Fermentation Microorganisms (Bacteria) and Muscles Results in NAD + for glycolysis…

4. or Alcoholic Fermentation Some plant cells & unicellular organisms (yeast)

5. Glycolysis + Fermentation: Good News = Continued production of ATP Bad News = Only enough energy for unicellular and very small multicellular organisms * What is a more efficient process?

6. Glycolysis + Aerobic Respiration Must add oxygen!

7. Aerobic Respiration Produces nearly 20 times as much ATP as glycolsis alone Two Stages: 1.Krebs Cycle 2. Electron Transport Chain (w/ chemiosmosis)

8. Krebs Cycle (Citric Acid Cycle) Two “turns” breaks down the glucose and yields 2 ATP + CO 2 waste

10. Electron Transport Chain (+ Chemiosmosis) = 34 ATP!

11. Cellular Respiration

13. Cellular Respiration + Photosynthesis