Best defined function of manganese in green plants is

nitrogen fixation

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water absorption

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photolysis of water

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Calvin cycle

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Solution

The correct option is C photolysis of water
Manganese $(M n^{2 +})$ is used for photolysis of water to produce oxygen and electrons during light reaction of photosynthesis. It is the phenomenon of breaking up of water into hydrogen and oxygen in the chloroplast. It acts as an essential cofactor.

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Best defined function of manganese in green plants is:

	Elements		Functions
(a)	Iron	(i)	Photolysis of water
(b)	Magnesium	(ii)	Required for chlorophyll biosynthesis
(c)	Chlorine	(iii)	Maintains anion cation balance
(d)	Manganese	(iv)	Helps to maintain ribosome structure

Transpiration is best defined as

(a) loss of water by the plant.

(b) evaporation of water from the aerial surfaces of a plant.

(d) release of water by a plant into the atmosphere.

	Column-I		Column-II
(a)	Iron	(i)	Photolysis of water
(b)	Zinc	(ii)	Pollen germination
(c)	Boron	(iii)	Required for chlorophyll biosynthesis
(d)	Manganese	(iv)	IAA biosynthesis

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