Some Microbes Use Non-O₂ Electron Acceptors to Complete the Electron

question 65

Multiple Choice

Some microbes use non-O₂ electron acceptors to complete the electron transport chain.An example of an organism that carries out this type of electron transport is a soil bacterium that takes in nitrate (NO₃⁻) and releases nitrogen gas (N₂) .The nitrate functions as a(n)

• A) energy source.
• B) electron acceptor.
• C) source of electrons.
• D) fuel molecule.
• E) respiratory chain component.

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