Electron energy is used to drive protons against concentration gradient across thylakoid membrane into

Stroma lamella

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Thylakoid lumen

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Stroma

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Interthylakoid space

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Solution

The correct option is A Thylakoid lumen
A) Stroma lamellae do not help in the formation of a proton gradient.
B) Protons are driven into the thylakoid lumen where a proton gradient develops.
C) The protons are driven from the stroma into the thylakoid lumen,
D) Interthylakoid space contains electron carriers like cytochromes b and f which help in driving protons across the thylakoid membrane.
So the correct answer is 'Thylakoid lumen'.

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