Energy released during movement of electrons through the photosystems in photosynthesis is used to drive protons across the membrane against concentration gradient. As a result the protons accumulate in

thylakoid lumen

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stroma of chloroplast

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matrix of mitochondrion

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none of these

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Solution

The correct option is B thylakoid lumen
Energy released during movement of electrons through the photosystems in photosynthesis is used to drive protons across the membrane against concentration gradient. As a result the protons accumulate in thylakoid lumen. The thylakoid lumen plays an important role for photophosphorylation during photosynthesis.
Thus, the correct answer is 'thylakoid lumen.'

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