1. CELLULAR RESPIRATION

2. DEFINITION
Process in which cells make ATP by breaking down organic compounds (e.g. glucose)

3. OVERALL CHEMICAL EQUATION
C6H12O6 + 6O2 
6CO2 + 6H2O + energy

4. AEROBIC vs. ANAEROBIC
BOTH – starts with glycolysis to produce 2 ATP

5. AEROBIC vs. ANAEROBIC Occurs in the presence of O2
Produces additional ATP
Occurs in the absence of O2
Does not produce additional ATP

6. AEROBIC vs. ANAEROBIC Occurs in the mitochondria (eukaryotes)
Occurs in the cytoplasm (cytosol)

7. AEROBIC vs. ANAEROBIC 2 stages: 2 types: Krebs cycle
electron transport chain
2 types:
lactic acid fermentation
Alcoholic fermentation

8. FERMENTATION
Anaerobic process in which glucose is converted into another organic compound

9. LACTIC ACID FERMENTATION
Process in which pyruvic acid is converted into lactic acid
Plays an essential role in the making of food products such as yogurt & cheese

10. LACTIC ACID FERMENTATION
Occurs in muscle cells during very strenuous exercise when there is not enough O2 available

11. ALCOHOLIC FERMENTATION
Process in which pyruvic acid is converted into ethyl alcohol (ethanol)
Is the basis of wine & beer production

12. ALCOHOLIC FERMENTATION
Used for the production of bread

13. AEROBIC RESPIRATION 2 major stages: Krebs cycle
electron transport chain

14. Kreb’s Cycle Occurs in the mitochondria (eukaryotes)
One glucose molecule causes 2 turns of the Krebs cycle

15. Electron Transport Occurs along the inner mitochondrial membrane
Oxygen is the final electron acceptor

16. AEROBIC RESPIRATION ENERGY YIELD:
max. = 38 ATP molecules/glucose molecule