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+, Cland 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

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