noun Biochemistry. The successive passage of electrons from one cytochrome or flavoprotein to another by a series of oxidation-reduction reactions during the aerobic production of ATP, with the electrons originating from an oxidizable substrate and ultimately being passed to molecular oxygen. The oxidation-reduction reactions generate the energy required for the production of ATP. 2 Encephalopathy
Flow of electrons via a series of electron carriers from reduced electron donors (e.g., NADH) to O2 in the inner mitochondrial membrane, or from H2O to NADP in the thylakoid membrane of plant chloroplasts. ( Figure 16-17)
Movement of electrons from a higher to a lower enery level along a series of electron carrier molecules, as in oxidative phosphorylation and photosynthesis.