Biology 9700 · AS & A Level · Carbohydrates and lipids

Carbohydrates and lipids — practice question

The diagram illustrates the way in which the $\beta$-glucose units within cellulose are linked together. What does it mean that the OH groups on carbon 2 of neighbouring glucose molecules lie on opposite sides of the molecule?

  • AThey can cross-link with other cellulose molecules by both hydrogen and glycosidic bonds.
  • BThey can form glycosidic bonds with adjacent OH groups of other cellulose molecules.
  • CThey can form hydrogen bonds between the $\text{CH}_2\text{OH}$ and OH on adjacent glucose molecules of the cellulose molecule.
  • DThey can form hydrogen bonds with adjacent OH and $\text{CH}_2\text{OH}$ groups of other cellulose molecules.

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