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  • Help me answer: The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction ?

The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction ?

 

  • Option 1)

    Manganese and Potassium

  • Option 2)

    Magnesium and Molybdenum

  • Option 3)

    Magnesium and Chlorine

  • Option 4)

    Manganese and Chlorine

 

Answers (1)

As learnt in

Photolysis of water -

Occurs in the lumen of thylakoid. Requires Mn+, Cl-, Ca2+ and oxygen evolving complex 

- wherein

2H_{2}O\rightarrow 4H^{+}+4e^{-}+O_{2}

e- move towards P680 of PSII and H+ accumulate in lumen and finally reduced to NADP

 

 Photolysis of water requires Mn+, Cl- and Ca2+

 


Option 1)

Manganese and Potassium

Incorrect option

Option 2)

Magnesium and Molybdenum

Incorrect option

Option 3)

Magnesium and Chlorine

Incorrect option

Option 4)

Manganese and Chlorine

Correct option

Posted by

Sabhrant Ambastha

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