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Glycogen synthase: Quiz


Question 1: Glycogen synthase (UDP-glucose-glycogen glucosyltransferase') is a glycosyltransferase ________ (EC that catalyses the reaction of UDP-glucose and (1,4-α-D-glucosyl)n to yield UDP and (1,4-α-D-glucosyl)n+1.
ProteinEnzyme inhibitorCofactor (biochemistry)Enzyme

Question 2: In other words, this enzyme converts excess ________ residues one by one into a polymeric chain for storage as glycogen.

Question 3: The reaction is highly regulated by allosteric effectors such as glucose-6-phosphate, by phosphorylation reactions, and indirectly triggered by the hormone ________, which is secreted by the pancreas.
GlucagonEndocrine systemAdiponectinInsulin

Question 4: Liver ________ serves as a storage pool to maintain the blood glucose level during fasting, whereas muscle glycogen synthesis accounts for disposal of up to 90% of ingested glucose.


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