THE BIG PICTURE: AEROBIC CELLULAR RESPIRATION GLYCOLYSIS Glucose, a six-carbon sugar, is broken into two, three-carbon molecules of pyruvate. THE KREBS CYCLE Further breaks down pyruvate, and stores energy by reducing NAD+ and FAD THE ELECTRON TRANSPORT CHAIN Uses NADH and FADH 2 to transport protons across the inner mitochondrial membrane, in order to make ATP. NET GAIN PER GLUCOSE 2 ATP 2 NADH NET GAIN PER GLUCOSE 8 NADH 2 FADH 2 2 ATP NET GAIN PER GLUCOSE About 34 ATP glucose pyruvate acetyl CoA reduced compounds ETC proton gradient ATP synthase

T HE K REBS C YCLE

THE BIG PICTURE: LACTIC ACID FERMENTATION GLYCOLYSIS 2 ADP 2 ATP 2 pyruvate 2 NAD+ 2 NADH 2 lactic acid (ouch!)

THE BIG PICTURE: ALCOHOL FERMENTATION GLYCOLYSIS 2 ADP 2 ATP 2 pyruvate 2 acetylaldehyde 2 NAD+ 2 NADH 2 Ethanol (mmm…) 2 CO 2