Bacteria growing under anaerobic conditions can respire using alternate electron donors and acceptors. One species has an electron transport chains with the following overall reactions. H2 + fumarate succinate. HCO2 + fumarate + 2H+→ HCO3 + succinate + H2O. Reaction Eº' Fumarate + 2H+ + 2e- → succinate 0.031V 2H+ + 2e- H2 -0.42 V HCO3 + 2e- + 2H+→ HCO2 + H2O -0.43 V a) Calculate how many ATP can be produced per electron for these electron transport systems? b) Can ubiquinone serve as the electron carrier in this system? look at reduction potentials c) Use your favourite search mechanism to find an electron carrier used. Please provide the reference.