The important role of PS-II in photosynthesis is

To cause photolysis of water

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To release energy

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To trap and assimilate

C O_{2}

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To reduce NAD to NAD

H_{2}

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Solution

The correct option is A To cause photolysis of water
The photolysis of water occurs during light reaction. The site for occurrence of photolysis is thylakoid lumen. The photolysis of water releases protons which accumulate in the lumen and contribute to the electrochemical gradient of protons. The electrons released are used up to fill the electron hole in the reaction centre of PSII and oxygen molecule is released as by product of photosynthesis. The electrons released during photolysis of water are ultimately used to synthesize the reducing power for reducing carbon dioxide later on. The mineral ions required for photolysis of water are calcium, manganese and chlorine.

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Similar questions

N A D^{+}

Splitting of water molecules during light reaction of photosynthesis is associated with

(a) PS I resulting in the release of $O_{2}$ , protons and transfer of electrons to PS II

(b) PS II resulting in release of $O_{2}$ , protons and transfer of electrons to PS I

(d) PS I resulting in the release of $O_{2}$ , protons and transfer of electrons to PS I.

Of the above statements

N A D P^{+}

P_{700}

P_{680}

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