Some hydrogen bacteria have a soluble (cytoplasmic) as well as a membrane- integrated hydrogenase that each serves different functions.

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This statement is true according to current scientific understanding. Some hydrogen bacteria have a soluble hydrogenase that functions within the cytoplasm, as well as a membrane-integrated hydrogenase that functions in the electron transport chain. These hydrogenases play important roles in the metabolism of hydrogen gas as an energy source for certain bacteria.

Some Hydrogen Bacteria Have a Soluble (Cytoplasmic) as Well as a Membrane-