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Foundations in biology

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Question 35

Cellulose is a structural polysaccharide that provides high tensile strength to plant cell walls, preventing cells from bursting under turgor pressure. Which statement is not a correct explanation of how the molecular structure of cellulose relates to its strength?

The polymer consists of β\betaβ-glucose monomers, requiring alternate residues to be rotated by 180∘180^\circ180∘ relative to their neighbours to form β\betaβ-1,4-glycosidic bonds.

The straight, unbranched chains run parallel to one another, allowing many weak hydrogen bonds to form between adjacent chains to provide collective strength.

High tensile strength is achieved when parallel cellulose molecules associate to form microfibrils, which are then bundled into macrofibrils.

Regular α\alphaα-1,6-glycosidic branches cross-link adjacent parallel chains, preventing them from sliding past each other.

Foundations in biology Questions

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