1. 5.7 Electron Transport Chain
Unit 5: Cell Energy
5.7 Electron Transport Chain

2. Produces from both the Krebs Cycle and glycolysis feed into the last step of cellular respiration

3. Electron Transport Chain
The last set of reactions in cellular respiration that uses the high energy electrons from the previous reactions to convert ADP into ATP
Electron carriers NADH and FADH2 from glycolysis and the Krebs cycle pass their electrons to the electron transport chain.

4. Summary
Takes place in the inner mitochondrial membrane

5. Summary
Aerobic

6. Summary Uses proteins and the enzyme ATP Synthase to make ATP
Electrons/Hydrogen ions from the electron carriers are passed down the protein chain releasing energy
Oxidative phosphorylation: Energy generated by the electron transport chain is used to move hydrogen ions across the mitochondrial membrane and into the intermembrane space
Hydrogen passes back across the membrane and ATP synthase generates ATP from ADP

8. Summary Products of the electron transport chain:
Each NADH converts to 3 ATP
Each FADH2 converts to 2 ATP
H20

9. Total ATP produced in Cellular Respiration per glucose molecule:
Glycolysis: 2 ATP
Krebs Cycle: 2 ATP
10 NADH: 28 ATP
2 FADH2: 4 ATP
_______________________________
36 ATP TOTAL

10. Cytosol Mitochondria 2ATP 4ATP 6ATP 18ATP 4ATP 2ATP 2 ATP 2NADH 6NADH
Glucose
Glycolysis
2ATP ATP 6ATP 18ATP ATP ATP
2 ATP
(substrate-level
phosphorylation)
2NADH
6NADH
Krebs
Cycle
2FADH2
2 Pyruvate
2 Acetyl CoA
ETC and Oxidative
Phosphorylation
Cytosol
Mitochondria