Question

In the glycogen synthase reaction, the precursor to glycogen is
A.glucose-6-P
B. UTP-glucose
C. UDP-glucose
D. glucose-1-P

Answer 1

d) glucose -1-p
........

Answer 2

Answer:

C. UDP-glucose

Explanation:

Glycogen shape Uridine diphosphate glucose (UDP-glucose) is the instant precursor for glycogen synthesis.

Glycogen synthase will handiest upload glucose devices from UDP-glucose onto a preexisting glycogen chain that has as a minimum 4 glucose residues.

Linkage of the primary few glucose devices to shape the minimal "primer" wished for glycogen synthase reputation is catalyzed with the aid of using a protein known as glycogenin, which attaches to the primary glucose and catalyzes linkage of the primary 8 glucoses with the aid of using alpha(1,four) bonds. The enzyme, glycogenin, initiates glycogenynthesis ( The enzyme glycogen synthase then catalyzes elongation of glycogen chains initiated with the aid of using glycogenin to a chane of 9 – eleven glucose molecule.

Glycogen synthase catalyzes switch of the glucose moiety of UDP-glucose to the hydroxyl at C four of the terminal residue of a glycogen chain to shape an (1-four)-glycosidic linkage .

So, the answer is In the glycogen synthase reaction, the precursor to glycogen is C. UDP-glucose.

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