Question

why fermentation important in O2 absence

Accepted Answer

once no O2 available to act as final e- acceptor, ETC cant operate so e- flow stops and ATP production, reduced NAD/FAD cant oxidise as there is no where for e-s to flow, so no regenerated NAD/FAD stops decarboxylation, oxidation of pyruvate and KC as no coenzymes to accept removed H2, glycolysis would also stop due to no NAD but fermentation prevents this

Front	why fermentation important in O2 absence
Back	once no O2 available to act as final e- acceptor, ETC cant operate so e- flow stops and ATP production, reduced NAD/FAD cant oxidise as there is no where for e-s to flow, so no regenerated NAD/FAD stops decarboxylation, oxidation of pyruvate and KC as no coenzymes to accept removed H2, glycolysis would also stop due to no NAD but fermentation prevents this

Fermentation O2 E Stops Nad/Fad Important Absence Act