Energy conservation in microorganisms can be highly diverse. Technically, any pair of electron donor (donates electrons and is oxidized) and electron acceptor (accepts electrons and is reduced) that forms a redox reaction with positive reduction potential can support microbial growth, although many of them have not been observed. Calculate how many moles of ATP can theoretically be generated from 1 mole of sulfur (So/SO4-) as the electron donor and nitrate as the electron acceptor (NO3-/N2)

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