Question

please explain where these 6NADH2, 2FADH2 and 2ATP molecules are formed in ''Krebs cycle'' and how??

Answer 1

Formation of 6NADH2:
-Decarboxylation(removal of carbon dioxide) from isocitrate to form alpha-ketoglutarate.
-Decarboxylation of alpha-ketoglutarate to succinyl COA
-Conversion of malate to oxaloacetate.
These are three reaction occurs twice so produce 6NADH2 as two pyruvate molecules are formed from one molecule of glucose.
FORMATION OF 2FADH2
Conversion of succinate to Fumarate.This reaction also occurs twice so produces two molecules.
FORMATION OF 2ATP
When succinyl CoA gets converted to Succinate it produces a molecule of GTP.This GTP gets converted to form ATP.This reaction also occurs twice so produces two molecules of ATP.