Members of the Gram-negative genera Aquifex and Hydrogenobacter are hydrogen-oxidizing bacteria. An example of their metabolism involves using _____. O oxygen as a source of energy and hydrogen as a terminal electron acceptor, forming water O water as a source of energy and oxygen as a terminal electron acceptor O glucose as a source of hydrogen atoms and oxygen as a terminal electron acceptor O hydrogen as a source of energy and oxygen as a terminal electron acceptor, forming water
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