Thylakoid vs Mitochondria Question

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osimsDDS

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Is this correct regarding the H+ concentration:

Mitochondria: the concentration gradient associated with the ETC involves a higher H+ concentration on the inner membrane space (between the outer membrane and the inner membrane)?

Thylakoid: the concentration gradient associated with the light reactions involves a higher H+ concentration on the inside of the thylakoid.

This would make sense for the mitochondria because the H+ ions would fall down their concentration gradients causing ATPase to produce ATP from ADP inside the cell.
While for the Thylakoid the ATP wants to be on the outside of the thylakoid so that the dark reactions could utilize the ATP in the stroma...Therefore, ATPase is structured so that the H+ ions fall from high to low gradient from inside the thylakoid to the outside...

IS THIS CORRECT???? thanks

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Yes that is right. H+ is pumped out of the matrix of the mito into the intermembrane space.
 
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