Question

Which element is required for photosynthetic evolution of oxygen?

• A. Cu
• B. Fe
• C. Zn
• D. Mn

Answer 1

The correct option is D Mn

Photolysis of water: Occurs at grana i.e., lumen side of grana thylakoid membrane with the help of water splitting complex or OEC (oxygen evolving complex). This step is associated with PS- II of Z- scheme.

Three minerals Mn ion, ${Ca}^{+},{Cl}^{-}$ are associated with splitting of water.

$2H_{2}O\to 4H^{+}+O_2+4e^{-}$

Hence, the correct answer is 'Mn'.