Question

Glycogen synthase (with appropriate reagents and cofactors) . . .

A. Synthesizes (makes) glycogen from glucose-1- phoshate

B. Is most active in the b form

C. Is most active in the a form

D. A and C above

E. B and C above

Answer 1

The correct option is D. A and C above.

Explaination- The glycogen synthase is an enzyme. This enzyme play important role in the conversion of the molecule glucose into the glycogen in the process called glycogenesis. Glycogen synthase synthesis glycogen from glucose-1-phosphate which is incorporated by the active form of synthase in the glycogen chain. This enzyme is present in muscle cells and liver. Glycogen synthase is most active in dephosphorylated state (a form of synthase) whereas the the phosphorylated state (b form of synthase) is inactive.

Therefore, Glycogen synthase (with appropriate reagents and cofactors) synthsesizes(make) glycogen from glucose-1-phosphate and is most active in the a form.