What is the difference between Krebs cycle and Electron Transport system?
Krebs cycle The first reaction in this cycle is the splitting of the coenzyme A group from acetyl CoA. This splitting releases bond energy which powers the next reaction which is the coupling of the acetyl group to a compound called oxaloacetate. The product of this reaction is citrate. Citrate then undergoes a number of conversions which collectively make up the reactions of the citric acid cycle. The final product of these conversions is oxaloacetate, permitting the intake of another molecule of acetyl CoA so the cycle can repeat itself. The acetyl group of the incoming acetyl CoA is completely oxidised to two molecules of carbon dioxide (CO2). One reaction produces a molecule of GTP, which is converted to ATP. This is the only direct production of ATP by the citric acid cycle. Electron transport chain The re-oxidation of NADH to NAD or FADH to FAD begins a series of oxidation/reduction reactions resulting in two products ; bond energy released by the reactions is harnessed to the re
