Refer to the Figure Below, Which Provides Information About the Series

question 29

Multiple Choice

Refer to the figure below, which provides information about the series of oxidation-reduction reactions that take place via the respiratory chain in the inner mitochondrial membrane. Which statement about the respiratory chain explains the biological importance of the information portrayed in the graph?

• A) The extensive folding of the inner mitochondrial membrane provides the space needed to accommodate the large number of proteins making up the respiratory chain.
• B) Oxygen serves as the final electron acceptor in the respiratory chain, forming water as a result of its acceptance of electrons that have passed down the chain.
• C) With each oxidation-reduction step in the respiratory chain, an electron loses free energy that is captured in a form that the cell can use to perform biological work.
• D) NADH and FADH₂ pass their electrons to different carriers in the respiratory chain.
• E) The components of the respiratory chain are physically arranged within the mitochondrial membrane in the order of transfer of electrons down the chain.

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