Q.

Proton gradient is broken down due to
a) Movement of electrons across the membrane to stroma
b) Movement of electrons across the membrane to lumen
c) Movement of proton across the membrane to lumen
d) Movement of proton across the membrane to stroma

AA
BB
CC
DD

A.

(d) Movement of protons across the membrane to stroma. Proton gradient is important because it is the break down of this gradient that leads to release of energy. The gradient is broken down due to movement of protons across the membrane to the stroma through the transmembrane channel of the F_0 of the ATPase. The energy released during the breaking down of proton gradient is used in formation of ATP

 



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