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Which one is an essential mineral, not constituent of any enzyme but stimulates the activity of many enzymes

1. Zn
2. Mn
3. K
4. Mg

Correct answer: K

Solution

Potassium is an essential mineral that is not a structural constituent of enzymes, but it activates or stimulates the activity of many enzymes. Zinc and manganese are more commonly associated with enzyme structure or direct catalytic roles, while magnesium is also an enzyme cofactor but the classic answer here is potassium.

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