For ten points, name this molecule, the primary component of plant cell walls.
A mixture of nitric esters of this compound is the main ingredient of gunpowder.  A polymer of glucose, it contains beta-glucosidic bonds much stronger than the alpha bonds found in starch.  The strong bonds mean this molecule cannot be digested without bacterial help, which is lacking in humans. For ten points, name this molecule, the primary component of plant cell walls.
A mixture of nitric esters of this compound is the main ingredient of gunpowder.  
cellulose