AP Biology Cellular Respiration Part 2

Is Oxygen present?

Pyruvate Conversion CYTOSOL Pyruvate NAD + MITOCHONDRION Transport protein NADH + H + Coenzyme ACO 2 Acetyl Co A

Kreb’s Cycle Simplified

Actual Kreb’s Cycle

Electron Transport Chain is located on the inner FOLDED membrane

Electron Transport Chain (Proteins are H+ Pumps)

“Building” the proton concentration gradient Protein complex of electron carriers H+H+ ATP Glycolysis Oxidative phosphorylation: electron transport and chemiosmosis Citric acid cycle H+H+ Q III I II FAD FADH 2 + H + NADH NAD + (carrying electrons from food) Inner mitochondrial membrane Inner mitochondrial membrane Mitochondrial matrix Intermembrane space H+H+ H+H+ Cyt c IV 2H / 2 O 2 H2OH2O ADP + H+H+ ATP synthase Electron transport chain Electron transport and pumping of protons (H + ), Which create an H + gradient across the membrane P i Chemiosmosis ATP synthesis powered by the flow of H + back across the membrane Oxidative phosphorylation

ATP Synthetase Complex using kinetic movement of H+ (protons)