In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: Patients with McArdle's disease lack the enzymes needed to break down this material. The synthesis of this material makes use of a compound called UDPG along with an enzyme that creates branches along its linear framework; thus this material contains both 1,4 and 1,6 alpha glycosidic bonds. Marathon runners ""hit the wall"" when they deplete their supply of this material which is the animal analogue of plant starch. For 10 points, name this polymer of glucose found in the human body which is broken down by the hormone glucagon.
A:
Science