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Question
Which of the following provides electrons for reduction reactions in photosynthesis?
Which of the following provides electrons for reduction reactions in photosynthesis?
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Solution
The correct option is A Water
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.
2H2O→4H++O2+4e−
It is believed that oxygen evolves as oxygen gas, electrons are accepted by PS II reaction centre through unknown substance and hydrogen ions temporarily stay in the thylakoid space.
Hence, the correct answer is 'Water'.
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.
2H2O→4H++O2+4e−
It is believed that oxygen evolves as oxygen gas, electrons are accepted by PS II reaction centre through unknown substance and hydrogen ions temporarily stay in the thylakoid space.
Hence, the correct answer is 'Water'.
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