What is the role of electron transport chain in photosynthesis?

What is the role of electron transport chain in photosynthesis?
  1. To circulate the electron within photosystem I
  2. To provide electrons to replace those removed from photosystem I
  3. To cause the proton gradient across the thylakoid membrane
  4. To synthesize ATP from ADP and inorganic phosphate

Solution

Electrons in photosystem I are replaced by electrons provided by photosystem II through the electron transport chain.

Asked in: NCERT

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