1. The versatility of catabolism
Plasma membrane

2. Fermentation enables cell to produce ATP w/o O2
aerobic
anaerobic
*Fermentation generates ATP by substrate-level phosphorylation

3. Cellular Respiration: one more time!
SUMMARY:
Organic + Oxygen Carbon + Water + Energy
Compounds Dioxide
C6H12O6 + 6 O CO2 + 6 H2O + energy
Redox reactions release energy
*Redox reactions
*loss of an electron = oxidation *gain of an electron = reduction
C6H12O6 + 6 O CO2 + 6 H2O
oxidation
reduction

4. *Dehydrogenases
*Nicotinamide adenine dinucleotide
*ATP can be synthesized in one of two ways:
Substrate-level phosphorylation
Oxidative phosphorylation

5. Cellular Respiration: an overview
3 metabolic stages:
*glycolysis
*Krebs cycle
*electron transport chain

6. Glycolysis harvests chemical energy by oxidizing glucose to pyruvate

7. The Krebs cycle: energy-yielding oxidation
cytosol
mitochondrial matrix
per pyruvate per glucose
1 ATP 2 ATP
4 NADH 8 NADH
1 FADH2 2 FADH2

8. Electron transport and ATP synthesis
FADH2
Some more accounting:
*For every NADH that transfers e- to ETC, 3 H+ are pumped across the inner mt membrane
*For every FADH2, 2 H+ are pumped across the inner mt membrane

9. Fermentation enables cell to produce ATP w/o O2
aerobic
anaerobic
*Fermentation generates ATP by substrate-level phosphorylation