The Krebb's cycle occurs in the matrix. It occurs twice per glucose molecule as two pyruvate molecules are formed during glycolysis, resulting in two molecules of acetyl coenzyme A forming.
Per turn: 3 x NADH, 2 x CO2, 1 x ATP and 1 x FAD are formed.
Stage 1: Oxaloacetate + Acetyl CoA ---> Citrate (6C)
Stage 2: Decarboxylation and reduction occurs to form a 5C intermediate- CO2 and NADH produced.
Stage 3: Decarboxylation and reduction occurs to form a 4C intermediate.
Stage 4: Oxidation of the 4C compound occurs and oxaloacetate is made:FAD and NAD are reduced to form NADH and FADH. ATP is also formed.
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