Ncert Exercises & Solutions

Splitting of water is associated with

1. photosystem I

2. lumen of thylakoid

3. both photosystems I and II

4. inner side of thylakoid membrane

The thylakoid is a photosynthetic unit in the chloroplast. It is a membrane bound structure. The membrane has photosystems I and II embedded in it in the form of chemicals and molecules. Splitting of water is associated with PS-II which occurs in presence of Mn²⁺ and Cl^- ions on the inner surface of thylakoid membrane.

2 H_{2} O

\to_{{Cl}^{-}}^{{Mn}^{+}}

4 H^{+} + O_{2} + 4 e

Photosystem I and II are associated with light reactions.

Page 213, XI NCERT

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