1. Krebs Cycle and Electron Transport Chain
Section 9-2

3. Krebs Cycle Location: matrix of mitochondria.
First, pyruvic acid is broken down into Acetyl Co-enzyme A and then into Citric Acid.
CO2 is produced
Electron carriers produced: FADH2 and NADH.
Net of 2 ATP are formed. (1 from each pyruvic acid from glycolysis)

4. Krebs Cycle
Section 9-2

5. Krebs Cycle Reactants: Products: Pyruvic Acid becomes
Acetyl Co-A becomes
Citric Acid
NAD+ and FAD+ used
ADP used
Products:
CO2 produced
NADH and FADH2 produced
….NET 2 ATP PRODUCED!

6. Electron Transport Chain
Location: cristae (inner membranes) of the mitochondria.
The electron carriers (NADH and FADH2) release their high energy electrons to carrier proteins.
H+ ions move through ATP channel to generate the ATP.
Oxygen is the final electron acceptor in the chain and combines with the H+ ions = H2O.
Net total of 32 ATP.
Animation

7. ETC Section 9-2 Electron Transport Hydrogen Ion Movement Channel
Mitochondrion
Intermembrane
Space
ATP synthase
Inner
Membrane
Matrix
ATP Production

8. ETC Reactants: Products:
NADH and FADH2 release electrons and H+ ions which move through ATP synthase…
Electrons added to H+ and O2 …
Products:
NAD+ and FAD+ produced
…producing ATP
…forming H2O
NET 32 ATP

11. Energy and Exercise
ATP in muscles and Creatine Phosphate to generate more ATP
Lactic Acid Fermentation

13. Chloroplasts
Mitochondria
CO2 and H2O
C6H12O6 and O2 C
C6H12O6 and O2
CO2 and H2O
6CO2 + 6H2O C6H12O6 + 6O2
6O2 + C6H12 O6 6H20 + 6CO2