Which of the following statements about the chemiosmotic synthesis of ATP is correct?
a. The energy for production of ATP from ADP comes directly from a gradient of electrons across the inner mitochondrial membrane.
b. Oxygen participates directly in the reaction that makes ATP from ADP and P.
c. The chemiosmotic synthesis of ATP requires that the electron transport in the inner mitochondrial membrane be coupled to proton transport across the same membrane.
d. The chemiosmotic synthesis of ATP occurs only in eukaryotic cells, because it occurs in mitochondria.
e. Chemiosmotic ATP synthesis requires oxygen.

The correct statement about the chemiosmotic synthesis of ATP is - c. The chemiosmotic synthesis of ATP requires that the electron transport in the inner mitochondrial membrane be coupled to proton transport across the same membrane.

The process of ATP synthesis using 'free energy' obtained when electrons are passed to several carriers (ETC) is known as chemiosmosis.

The actual point of the synthesis of ATP takes place when electrons pass the inner mitochondrial membrane.
The protein complexes of the electron transport chain accept and pass on electrons to the next acceptor, that is they undergo redox reactions.
during this process, the electron moves down its energy gradient releasing free energy at each transfer, termed as EMF
EMF leads to the movement of protons up their concentration gradient into the matrix of mitochondria
Energy is released within this process, resulting in the synthesis of ATP.

Thus, the correct choice is - c. The chemiosmotic synthesis of ATP requires that the electron transport in the inner mitochondrial membrane be coupled to proton transport across the same membrane.

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