Synthesis of glycogen by the enzyme glycogen synthase requires an activated form of glucose that is synthesized by the condensation of glucose 1-phophate with
a) ATP
b) GTP
c) CTP
d) UTP
e) TTP

Glycogen synthase is the enzyme that catalyzes glycogen chain elongation by transferring a glucose residue from UDP-glucose to the non-reducing end of the existing branch of glycogen. The incoming glucose is bonded to the non-reducing end by alpha (1 to 4) glycosidic linkage.

For the purpose, glucose -6 phosphate is converted into glucose -1 phosphate. The enzyme UDP-glucose pyrophosphorylase then converts the glucose-1 phosphate into UDP-glucose by condensation of glucose-1 phosphate with UTP and pyrophosphate is released.

The UDP- glucose serves as an immediate donor of glucose residue for elongation of glycogen catalyzed by glycogen synthase. Conversion of glucose-6 phosphate into glucose -1 phosphate and then into UDP-glucose favors the glycogen synthesis energetically.

Synthesis of glycogen by the enzyme glycogen synthase requires an activated form of glucose that is synthesized by the condensation of glucose 1-phophate with a) ATP b) GTP c) CTP d) UTP e) TTP

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Synthesis of glycogen by the enzyme glycogen synthase requires an activated form of glucose that is synthesized by the condensation of glucose 1-phophate with
a) ATP
b) GTP
c) CTP
d) UTP
e) TTP