<prompt> Glycogenin primer is glucosylated by:UDP GlucoseGlucose 1 PO4UDP Glucose 1 PO4UDP Glucose 6 PO4  <response>: Ans. A. UDP GlucoseRef: Harper 31e page 164Glycogenin, a 37 kDa protein is glucosylated on specific tyrosine residue by UDP glucose.Glycogenenin catalyses transfer of 7 glucose residue from UDP-Glc, in l-4 linkage to form Glycogen primer.Further Glucose on glycogen primer are added by Glycogen Synthase to nonreducing end till growing chain is at least 11 glucose residue long. 