Question

Two water molecules release four protons. Twelve water molecules will release

• A. 24 H${}^{+}$
• B. 48 H${}^{+}$
• C. 12 H${}^{+}$
• D. 6 H${}^{+}$

Answer 1

The correct option is A 24 H${}^{+}$

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.

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

2 water molecules produce 4 protons. So, twelve water will produce 24 protons.

Hence, the correct answer is '24H${}^{+}$'.