Kinase require: (A) Mn++, (B) Cu++, (C) Mg++, (D) Inorganic phosphate
Answer is C. Mg++ is the activator of many enzymes requiring ATP. Alkaline phosphatase, hexokinase, fructokinase, phosphofructokinase, adenyl cyclase, cAMP-dependent kinases, etc. need magnesium.Ref: DM Vasudevan, Page no: 420