Why does the cell utilize a nucleotidyl-sugar intermediate during glycogen synth

Question

Why does the cell utilize a nucleotidyl-sugar intermediate during glycogen synthesis?

A) The UDP-glucose intermediate serves as a mechanism to sequester a poll of glucose units solely for the synthesis of glycogen
B) The formation of UDP-glucose intermediate is required to provide the thermodynamic coupling that makes glycogen synthesis possible
C) The intermediate is capable of making many more weak interactions with glycogen synthase compared to glucose 1 phosphate alone
D) UDP is a better leaving group than a simple phosphate
E) All of the above

Thanks in advance

Explanation / Answer

Answer:

Choices (A); (B); (C) are TRUE... I am not sure about choices (D) and (E)......

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