<prompt> Enzyme activated by covalent phosphorylation isGlycogen phosphorylaseAcetyl CoA carboxylaseHMG CoA reductasePyruvate carboxylase  <response>: Glycogen phosphorylase removes glucose as glucose-1-phosphate from glycogenphosphorolysis. It contains pyridoxal phosphate as a prosthetic group.Ref: DM Vasudevan, 7th edition, page no: 124 