1. Oxidative phosphorylation
Oxidative Phosphorylation: electron transport chain and chemiosmosis
e- trasport chain embedded in INNER mito membrane
Composed of 3 transmembrane H+ pumps
Electrons flow through e- chain
Loss of energy from e-s powers H+ pump
O2 is final electron acceptor, no O2 = no e- chain

2. Electron Transport Chain & ATP Synthase

3. Electron Transport Chain
H+ ions flow back down gradient through ATP synthase
ATP synthase harnesses the proton motive force
ATP synthase adds a P to ADP to make ATP
Do you think the inner mito membrane is permeable to H+ ions?
This is the process of chemiosmosis

4. Chemiosmosis

5. Chemiosmosis
Chemiosmosis: an energy-coupling mechanism that uses energy stored in the form of an H+ gradient across a membrane to drive cellular work.
The e- chain and chemiosmosis together make up the process of oxidative phosphorylation
ATP is phosphoralayted
Oxygen is necessary
ATP/Glucose is 36-38,
Oxidative phosphorylation produces alone.

6. ATP Yield / Phase of Respiration

7. Remember
Aerobic respiration uses oxygn

8. A few alternatives
When O2 is not present

9. Fermentation Production of ATP w/o O2 This is ANAerboic respiration
Glycolysis still in the picture
Rember O2 not needed for glycolysis
NAD+ is electron acceptor
Two common types…
Alcohol fermentation
Lactic acid fermentation

10. Alcohol Fermentation Pyruvate converted to ethanol, releasing CO2
NADH is oxidized to make NAD+

12. Lactic Acid Fermentation
Pyruvate reduced by NADH
So did it gain or loose electrons?
Lactate is formed as waste product.

14. Facultative Anerobes
Organisms that can do aerobic respiration when possible
Can switch to fermentation under aerobic conditions

15. Glycolysis and Citric Acid Cycle
Intermediates of these processes can be diverted into a number of other anabolic pathways
Biosynthesis is the production of macromolecules
Many other compounds can be used to make ATP in cellular respiration
Other sugars
Proteins
fats

16. Try these on for size…
Explain the specific role of glycolysis in cellular respiration.
Describe the function of water in cellular respiration and photosynthesis.