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ATP synthase is composed of two major complexes: $F_0$ which is in the membrane and $F_1$ which is outside of the membrane. The complexes are connected to each other via the axle and stator. Both the $F_0$ and $F_1$ complexes have different functions. One complex turns while the other remains stationary and each complex interacts (binds) with different molecules.

Goodsell, David. ATP Synthase. Digital Image. Protein Database. PDB-101. Dec. 2005. Web. 4 Oct. 2016.

Which of the following MOST accurately describes the movement and function of the $F_0$ and $F_1$ subunits when the ATP synthase is converting ADP and Pi into ATP?

A

$F_0$ converts potential energy from the proton gradient and spins.
$F_1$ catalyzes the formation of ATP and stays stationary.

B

$F_0$ converts potential energy from the proton gradient and stays stationary.
$F_1$ catalyzes the formation of ATP and spins.

C

$F_0$ catalyzes the formation of ATP and spins.
$F_1$ converts potential energy from the proton gradient and stays stationary.

D

$F_0$ catalyzes the formation of ATP and stays stationary.
$F_1$ converts potential energy from the proton gradient and spins.

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