Some Present-Day Bacteria Use a System of Anaerobic Respiration Characterized

question 187

Multiple Choice

Some present-day bacteria use a system of anaerobic respiration characterized by an electron transport chain analogous to that found in aerobic organisms. Which of the following correctly characterizes the anaerobic electron transport chain?

• A)It uses oxygen as a final electron acceptor.
• B)It is embedded in the outer mitochondrial membrane rather than the inner mitochondrial membrane.
• C)It establishes a proton gradient between the cytoplasm and the extracellular fluid.
• D)It establishes a proton gradient between the intermembrane space and the cytoplasm.
• E)None of these answer options accurately characterizes the anaerobic electron transport chain.

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