Elcdectron Transport essays

Elcdectron Transport essays Electron transport is the last phase and most important phase of cell respiration. It accounts for most of the ATP made in cell respiration. Cell respiration makes a total of thirty eight ATPs, two from Glycolysis, two from the Krebs cycle and thirty four from electron transports. Electron transport takes place after Glycolysis and the Krebs cycle. Glycolysis and the Krebs cycle make their ATP through substrate level Phosphorylation while electron transport makes its ATP through oxidative phosphorylation. Glycolysis and the Krebs cycle are important to electron transport; NADH carries electrons from glycolysis to the spot where electron transport takes place. NADH and FADH2 carry the electrons from the Krebs cycle to the spot of electron transport. So with out Glycolysis or the Krebs cycle electron transport would not take place. The electron transport chain is located in the inner membrane of the mitochondrion. It is made up of a collection of molecules that are set up in a way that each molecule is less electronegative than the molecule below it. So like a set of stairs as you go down the stairs each molecule becomes more electronegative and then when you get to the second to last step if you have ever heard the saying, that last step is a big one you could use that phase in this context. The last step is from a relatively low electronegative molecule to a oxygen molecule which has a very high electro negativity. Most components of the chain are proteins. Tightly bound to these proteins are prosthetic groups, nonprotein essential for the catalytic functions of certain enzymes. During electron transport along the chain, these prosthetic groups alternate between reduced and oxidized states as they accept and donate electrons. Each member of the chain changes between a reduced state and an oxidized s tate. A component of the chain becomes reduced when it accepts electrons from it ...