Cellular Respiration - Lecture Notes 9/26 9/28 Cellular...

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Lecture Notes 9/26 – 9/28 Cellular Respiration – plants & animals glucose (C6H12O6) + 6O2 → 6CO2 + 6H2O + energy glycolysis cytoplasm; anaerobic pyruvate – end product each step is catalyzed by an enzyme; each product becomes substrate of next enzyme NADH → → → → NAD+ bring e- to e- transport chain 1 glycolysis (cont) 1.1 each step is catalyzed by an enzyme; each product becomes substrate of next enzyme 1.2 glucose → 6 carbons – start at cytoplasm 1.3 add 2 ATP 1.4 split it & have 2 G3P 1.5 G3P turns into pyruvate 1.5.1 per G3P: 1.5.1.1 1 NADH
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1.5.1.2 2 ATP 1.5.1.3 1 pyruvate 1.6 end products: 1.6.1 2 pyruvate 1.6.2 2 NADH 1.6.3 4 ATP 1.7 fermentation – anaerobic 1.7.1 alcoholic → yeast & bacteria → CO2 plucked off (ethanol) 1.7.2 lactic acid → animal cells → no CO2 plucked off (2 lactate) 1.8 net yields: 2 ATP + 2 NADH + 2 pyruvate 1 Aerobic respiration 1.1 Kreb Cycle: → oxygen NOT used directly
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Unformatted text preview: 1.2 3 carbon pluck off CO2 AcetylCoA oxaloacetate citrate (6 carbon) End product (per cycle): 1. 2 CO2 2. 3 NADH 3. 1 FADH 4. 1 ATP 2 turns per glucose (total end product): • 4 CO2 • 6 NADH • 2 FADH • 2 ATP • 1 Electron transport chain → oxygen used directly 1.1 e- moves down chain, losing energy w/ each step 1.1.1 energy lost is used to synthesize ATP 1.1.2 also pumps H from low concentration to high concentration (intramembranous space) 1.2 aerobic 1.2.1 mitochondria 1.2.2 inner membrane 1.2.3 NADH + FADH2 1.2.4 oxygen → final e- acceptor 1.3 H+ proton requires protein (ATP synthase) to move it across phospholipid bilayer into the cytoplasm 2 Chemiosmotic phosphorylation – high to low concentration 2.1 inner membrane 2.2 protein gradient 2.3 ATP synthase – phosphate added to ADP → ATP is produced • 1....
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