Question

Mineral involved in photolysis of water are _____
a)Mn
b)Ca
c)Mg
d)Cl

A)a,b
B)a,b,d
C)c,d
D)a,b,c

Answer 1

Hint:Minerals present and play an important role in photolysis. It is a chemical reaction in which a chemical compound is broken down by photons.

Complete answer:
The process of light energy conversion to chemical form by specialized plant cell organelles, the chloroplasts, is well understood and concerned with the catalytic role played by manganese in oxygen evolution. The accumulation of four redox equivalents leads to the oxidation of water to yield molecular oxygen by a water-splitting metal enzyme which involves at least two manganese atoms per molecule of enzyme. The manganese activates enzymes involved in photosynthesis and nitrogen metabolism, especially in photolysis of water to release oxygen.
All parts of photosynthesis are important, arguably the photolysis of water is the most important reaction in the process. Calcium appears to modulate activity of the phosphatase enzymes in the carbon reduction cycle. Its reaction centre may be tightly bound in chloroplasts. Stromal calcium may regulate several enzyme activities.
The role of chloride in the water splitting mechanism is to participate together with charged amino acid side chains in a proton relay network, which facilitates proton transfer from the Mn cluster to the medium. The protective role of chloride ions against inhibition of photosynthetic water splitting complexes by amines was investigated with purified photosystem II membrane particles from chloroplasts. It is concluded that the functions of $Cl^-$ are brought about not because it is bound to the largest site the inhibitory actions of Lewis amines and hydroxyl. Thus Manganese and calcium and chloride present and play an important role in photolysis

Note:Calcium is the part it plays in the water-splitting reaction of photosynthesis.
>Manganese activates enzymes involved in photosynthesis.
>Chloride is involved in charge amino acid chains in a proton-relay-network.
>Photolysis is an important factor of nutrient cycle.