Cellulose vs Starch 0.0 / 5 ? BiologyBiological moleculesASEdexcel Created by: elrobertson29Created on: 13-02-17 11:29 structure of starch storage polysaccharide insoluble Amylose: a-glucose chain, 1,4 glycosidic bonds, forms a helix, hydrogen bons amylopectin polymer of a-glucose, 1,4 and 1,6 glycosidic bonds, branched chain, easily hydrolysed 1 of 3 structure of cellulose b-glucose polymer condensation polymerisation monomers held - 1,4 glycosidic bonds alternate b-gluc. mols inverted long, straight chain adjacent chains - hydrogen bonds Microfibrils: rigid link to form cellulose fibres cellulose component of CW strength - resist osmotic pressure 2 of 3 starch vs cellulose Cellulose Starch 1,4 + 1,6 glycosidic bonds 1,4 glycosidic bonds only branched unbranched all glucs/mons same way up alt glucs/mons upside down helix/coiled/compact straight alpha glucose beta glucose no micro/macro fibrils/fibres micro/macro fibrils/fibres 3 of 3
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