Difference between Citric acid cycle and Electron Transport Chain
Cellular Respiration is a catabolic process where respiratory substrates like glucose is broken down or oxidised to form carbon dioxide and water with release of energy as ATP. This energy is used to drive all cellular activities.
Stages of Cellular respiration
1. Glycolysis: glucose broken down to two pyruvate molecules
2. Link reaction: Pyruvate transported to mitochondria and converted to Acetyl CoA with the release of CO2
3.Krebs cycle: Acetyl CoA enters krebs cycle by combining with oxaloacetate to form citrate; the first compound formed in Krebs cycle (therefore krebs cycle also called as citric acid cycle)
4. Electron transport chain and oxidative phosphorylation: NADH and FADH2 produced in Krebs cycle enters electron transport chain, creating a proton motive force and finally produces ATP with O2 as terminal electron acceptor forming H2O.
Krebs Cycle vs Electron Transport Chain (ETC)
Electron Transport Chain (ETC)
Electron transport chain occurs in the mitochondrial inner membrane (cristae)