According to the chemiosmotic hypothesis of ATP formation in the chloroplast, which one does not contribute to the development of proton gradient across the thylakoid membrane?

Question

According to the chemiosmotic hypothesis of ATP formation in the chloroplast, which one does not contribute to the development of proton gradient across the thylakoid membrane? (A) Splitting of water (B) Reduction of NADP+ to NADPH + H+ (C) Reduction of NAD+ to NADH + H+ (D) Removal of H+ from stroma while transporting electron

Tardigrade Admin · Accepted Answer

NAD+ is not associated with ETS in chloroplast. According to chemiosmotic hypothesis of ATP formation in chloroplast, reduction of NAD+ to NADH + H+ does not contribute to develop proton gradient across thylakoid membrane.

Q. According to the chemiosmotic hypothesis of ATP formation in the chloroplast, which one does not contribute to the development of proton gradient across the thylakoid membrane?

Splitting of water

Reduction of $N A D P^{+}$ to $N A D P H + H^{+}$

Reduction of $N A D^{+}$ to $N A DH + H^{+}$

Removal of $H^{+}$ from stroma while transporting electron

$N A D^{+}$ is not associated with ETS in chloroplast.
According to chemiosmotic hypothesis of ATP formation in chloroplast, reduction of NAD⁺ to NADH + H⁺ does not contribute to develop proton gradient across thylakoid membrane.