Starch is a polymer of glucose molecules in plants with a role analogous to that of glycogen in animals. Starch synthesis requires ADP-glucose generated by ADP-glucose pyrophosphorylase. The biochemical mechanism of ADP-glucose pyrophosphorylase catalysis is similar to that of UDP-glucose pyrophosphorylase. What is the driving force for the ADP-glucose pyrophosphorylase reaction? hydrolysis of ADP-glucose Ohydrolysis of pyrophosphate O production of pyrophosphate O production of ADP-glucose Suppose a researcher introduces a mutation into the glucosidase domain of the mammalian glycogen debranching enzyme. The mutation inhibits the activity of the glucosidase but does not affect the other functions of the enzyme. The researcher then introduces the mutated enzyme into mammalian cells that do not express wild type glycogen debranching enzyme. Predict the effect of the mutation on glycogen metabolism. O linear glycogen chains with minimal branching O glycogen molecules with branches containing five or more glucose residues O glycogen molecules with branches containing a single glucose residue O glycogen molecules with branches containing four glucose residues