Biological importance of magnesium and calcium - class-XI

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Multiple Choice

Select the  correct statement about $Mg^{2+}$   ions : 

  1. These ions are concentrated more in intracelluar then in extracellular fluids in animal bodies
  2. Activation of phosphate transfer enzyme takes place in their presencde
  3. They are involved in carbohydrate metablism
  4. All are correct statement
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