Which one is an essential mineral, not constituent of any enzyme but stimulates the activity of many enzymes?
A
Zn
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B
Mn
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C
K
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D
Mg
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Solution
The correct option is C K
Potassium is a macronutrient absorbed by the plant as potassium ion (K+). It helps in maintaining an anion-cation balance in cells and is involved in the protein synthesis, opening and closing of stomata, activation of many enzymes and in the maintenance of the turgidity of the cells.