Which of the Following Compounds is Required to Add a Unit

Question

Which of the following compounds is required to add a unit of glucose to a glycogen molecule?
A) ADP-glucose
B) ATP-glucose
C) UDP-glucose
D) UTP-glucose

Accepted Answer

UDP-glucose is required to add a unit of glucose to a glycogen molecule. UDP-glucose acts as the donor molecule and is transferred to the growing glycogen chain by glycogen synthase. ATP-glucose and ADP-glucose are involved in other glucose metabolism pathways, while UTP-glucose is not a known molecule involved in glucose metabolism.