February/March 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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10CarbohydratesHard1 mark
The diagram shows how the -glucose monomers of cellulose are linked to each other.
Diagram of part of a cellulose molecule showing four $\beta$-glucose monomers linked in a chain by glycosidic bonds (–O– links between adjacent rings); each monomer's –OH and –CH$_{2}$OH groups on carbon 2 are drawn on alternating (opposite) sides of the chain
The –OH groups on carbon 2 of adjacent glucose monomers are on opposite sides of the cellulose molecule.
What is the main way in which this arrangement of –OH groups on carbon 2 contributes to the strength of structures made of cellulose?