-On inner mitochondrial membrane known as the cristae
- Has a series of electron carriers = electron transport chain
- Each one has a haem group (co factor) which contains iron, Fe.
(If it's Fe2+ it is reduced ~ gained e- | If it's Fe3+ it's oxidised ~ loss e-)
- NADH releases H to the first carrier
- First carrier passed H to the second carrier
- H now splits into H+ and e- and only the e- is passed on to the net carrier
- H+ is pumped into the inter membrane space
- There is now a high concentration of H+ in intermediate slate = protein motive force/electrochemical gradient
- H+ diffuses through the stalked particle which acts as a channel protein of hydrogen ions back into the matrix
- H+ are back in matrix they recombine with their e- to form an Hydrogen atom.
- H combines with O2 (which we breathe in) to form H2O hich is a waste product of respiration
- Enzyme involved - cytochrome oxidase
- Oxidose phosphorylation is making ATP using oxygen therefore involves electron transport chain
- Chemiosmosis - making ATP as H+ diffuse through stalked particle
No comments:
Post a Comment