Which of the following is NOT correct about the process of methanogenesis?
A) CO2 and H2O are weak electron acceptors, whereas CH4 and H2 are strong electron donors. B) CH4 synthesis from CO2 releases energy for growth. C) CH4 and water can be formed from CO2 and 4H2 from a hydrogen donor. D) Oxygen atoms in CO2 are reduced one at a time. E) Oxygen atoms in CO2 are reduced to water at the same time.