The enzyme _________ removes one glucose monomer at a time from a glycogen molecule, and the enzyme __________ forms the sugar nucleotide UDP-glucose from glucose 1-phosphate.
a) Glycogen synthase, Glycogen phosphorylase
b) Glycogen phosphorylase, Glucose-6-phosphatase
c) Glucose-6-phosphatase, Glycogen synthase
d) UDP-glucose synthase, Glycogen phosphorylase