Starch- main energy storage material in plants, store excess glucose as starch
made of a-glucose molecules, starch is a mixture of:
amylose- long, unbranched chain. coiled structure due to bonds, compact, good for storafe, more into small space
amylopectin- long, branched chain. side branches allow enzymes that break down the molecule to get at the bonds easily. glucose released quickly
starch is insoluble in water, doesnt cause water to enter cells by osmosis. good forb storage.
Ceullulose- major component of cell walls in plants
long, unbranched chains of b-glucose, joined by glycosidic bonds, bonds are straight so cellulose chains are straight. chains are linked by hydrogen bonds to form microfibrils, which provide structural support.
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