Biology 1002B Chapter Notes - Chapter 6.5 & 6.7a: Cellular Respiration, Cytosol, Pyruvic Acid
Document Summary
6. 5 oxidative phosphorylation: electron transport and chemiosmosis. Following the citric acid cycle, all of the carbon atoms originally present in glucose have been oxidized and released as carbon dioxide. Besides atp formed by substrate-level phosphorylation, the potential energy originally present in glucose now exists in molecules of nadh and fadh2. It is the role of the electron transport chain (etc) coupled with the process of chemiosmosis to extract the potential energy in these molecules and synthesize additional atp. The etc comprises a system of components that in eukaryotes, is found in the inner mitochondria membrane. The chain facilitates the transfer of electrons from. Nadh and fadh2 to oxygen and consists for four proteins complexes, the second of which is a single peripheral membrane protein and the rest of which are composed of multiple proteins. In an etc it is not the proteins themselves that transfer the electrons, but rather electron transport is facilitated by non-protein molecules called prosthetic groups.
