The mitochondrial electron transport system and the photosynthetic electron transport system are similar in many ways. in what ways are they different? a) electrons are transferred by redox reactions in mets but not in pets. b) pets has a 1 e- carrier to transfer electrons from psii to psi, but mets uses a 2 e- carrier to transfer electrons from complex iii to complex iv. c) mets is dependent on a source of reducing power obtained from dietary nutrients, whereas pets obtains reducing power from light energy and the process of photo-oxidation. d) the inner mitochondrial membrane is impermeable to protons, but the thylakoid membrane is permeable to protons. e) the electron carriers in mets use only fe and s centers, whereas the electron carriers in pets only use cu centers. f) chemical energy captured by mets and oxidative phosphorylation is limited to atp, whereas pets and photophosphorylation together capture energy in the form of atp and nadph. g) pets uses the pq cycle to translocate protons across the thylakoid membrane, whereas the q cycle in mets is used to tether cytochrome c to the inter-membrane space.