ELECTRON TRANSPORT SYSTEM

Recaps Gycolysis glucose(C6H12O6) + 2 ADP + 2 Pi + 2 NAD+  2pyruvic acid(C3H4O3) + 2 ATP + 2 H2O + 2 NADH + 2 H+ Pyruvate dehydrogenase pyruvic acid + NAD+ + CoASH acetyl-CoA(C2H3O-CoA) + CO2 + NADH + H+ TCA acetyl-CoA(C2H3O-CoA) + 3 NAD+ + FAD + GDP + Pi + 2H2O CoA-SH + 2 CO2 + 3 NADH + 3 H+ + FADH2 + GTP

Overall Glucose (C6H12O6) + 2 ADP + 2 Pi + 2 NAD+ (cytoplasm) + 8 NAD+ + 2 FAD + 2 GDP + 2Pi + 2 H2O (mitochondria) + 2 ATP + 2 NADH + 2 H+ (cytoplasm) + 6CO2 + 8 NADH + 8 H+ + 2 FADH2 + 2 GTP (mitochondria) Much of the energy released by oxidation of glucose has been retained in bonds of reduced NADH and FADH2

Electron transport and ATP synthesis as described in BIS 2A:

reduced donor oxidized donor (e.g. malate) (e.g. OAA) oxidized acceptor reduced acceptor (NAD+) (NADH + H+) 1/2 O2 H2O Why do electrons flow in this direction?

-2H+ -e- || O OH | . O.