Question

In mitochondria, synthesis of ATP uses a proton motive force that is used to

a) Drive protein conformation changes in the Fo complex of the ATP synthase to stabilize condensation of ADP and Pi
b) Drive protein conformation changes in the F1 complex of the ATP synthase to stabilize condensation of ADP and Pi
c) Transport ATP out of mitochondria
d) Transport inorganic phosphate into mitochondria
e) None of the above

Answer 1

The correct answer will be option-B.

Step-by-step explanation:

The ATP synthase is the multi-complex enzyme which helps in the formation of ATP molecules. The ATP synthase consists of two subunits- F₀ and F₁ in which F₁ unit contains α, β, and γ subunit which rotates and changes the conformation of the β subunit. The β subunit cycles in three states- O - open, L - loose and T - tight conformation.

The flow of protons binds the ADP and Pi to L state and O becomes L. Later the ATP is released out when T changes to O state.

Thus, the proton motive force causes the condensation of ADP and Pi to form ATP and Option-B is the correct answer.