Castilla Y León PAU Biology Practice Questions - Castilla Y León PAU Biology (Biología 2o Bachillerato) Exam

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Cellulose serves as a structural component in plant cell walls, whereas starch serves as energy storage. What structural feature accounts for the mechanical rigidity and resistance of cellulose to human digestive enzymes?

Linear unbranched chains of D-glucose linked by beta(1 -> 4) glycosidic bonds forming microfibrils Branched polymer chains of D-glucose linked by alpha(1 -> 4) and alpha(1 -> 6) bonds Coiled helical chains of D-glucose linked exclusively by alpha(1 -> 4) bonds Heteropolysaccharide composition containing alternating units of N-acetylglucosamine

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Linear unbranched chains of D-glucose linked by beta(1 -> 4) glycosidic bonds forming microfibrils

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