In oxidative phosphorylation, which structure in the inner mitochondrial membrane is directly responsible for synthesizing ATP from ADP and inorganic phosphate?

• A. Cytochrome c oxidase (Complex IV)
• B. Cytochrome $b{c}_1$ complex (Complex III)
• C. NADH dehydrogenase (Complex I)
• D. ATP synthase (Complex V, $F{o}_0–$ F{1}_1$ATPase)$

Answer: (D)