Why is the structure of glycogen so much more branched than the structure of starch? (a) Starch is found in the liver while glycogen is used in the muscle. (b) The many branches in glycogen enable many phosphorylase enzymes to work simultaneously for a quick release of glucose when needed. (c) In glycogen, the activity of branching and debranching enzymes is less meticulously balanced than in starch. (d) In glycogen, water molecules fill a high amount of extramolecular space, forcing a pressure to increase branching. In starch molecules, water molecules do not activate branching enzyme in the same manner. (e) In glycogen, a signaling cascade activates branching enzyme. Such cascade is absent in cells storing starch .