Which group of three micronutrient elements affect both photosynthetic and mitochondrial electron transport?

Cu, Mn, Fe

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Co, Ni, Mo

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Ca, K, Na

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Mn, Co, Ca

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Solution

The correct option is A Cu, Mn, Fe
Cu, Mn and Fe Micronutrient elements affect both photosynthetic and mitochondrial electron transport as follows:
Iron(Fe) - It is an important constituent of a protein involved in the transfer of electrons like ferredoxin and cytochromes.
Manganese(Mn) - It activates enzymes of respiration, photosynthesis and nitrogen metabolism.
Copper(Cu) - It is a component or activator of plastocyanin, cytochrome oxidase, RuBP carboxylase.
So the correct answer is 'Cu, Mn, Fe'.

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