Oxidative Phosphorylation, as It Occurs in Modern Eukaryotes, Is a Complex

question 69

Multiple Choice

Oxidative phosphorylation, as it occurs in modern eukaryotes, is a complex process that probably arose in simple stages in primitive bacteria.Which mechanism is proposed to have arisen first as this complex system evolved?

• A)electron transfers coupled to a proton pump
• B)the reaction of oxygen with an ancestor of cytochrome c oxidase
• C)ATP-driven proton pumps
• D)the generation of ATP from the energy of a proton gradient

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