Question

When the ATP synthase molecules are open, the hydrogen ions move out of the thylakoid. how does the cell ise kinetic energy of the moving ions?

A. To split ATP into ADP and phosphate group

B. To combine ADP with a phosphate group to produce ATP.
C. To alter the shape of the photosystem ll protine
D. To power the electron transport chain

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Answer 1

That would be B.

When hydrogen ions(H+) move down their concentration gradient through the ATP synthase, that causes the ATP synthase enzyme to become active and produce ATP(by adding a phosphate group to ADP)

Answer 2

The correct answer will be option-B.

Step-by-step explanation:

ATP synthase is a multi-enzyme complex which is used to produce ATP as a result of the flow of protons in the mitochondria as well as the chloroplast.

The ATP synthase consists of two units- F₀ and F₁ in which the F₀ unit is embedded in the membrane and acts as a way to the protons whereas the F₁ contains the catalytic subunit which changes its conformation to form ATP from ADP and Pi.

The enzyme complex in chloroplast contains its F₁ portion towards the stroma and the protons flow from the inside of the thylakoid to stroma through F₀. The enzyme uses this energy to synthesize the ATP molecules from ADP and Pi.

Thus, Option-B is the correct answer.