A-LevelBiologyBiological molecules9700/12 · May/June 2018 · Q91 Mark
Which diagram shows the reaction that occurs to join two of the monomers that form cellulose?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
ATwo alpha-glucose monomers forming a 1-4 glycosidic bond, releasing water.
BTwo alpha-glucose monomers forming a 1-4 glycosidic bond with incorrect bond representation, releasing water.
CTwo alpha-glucose monomers forming a 1-4 glycosidic bond with incorrect bond representation, releasing water.
DTwo beta-glucose monomers forming a 1-4 glycosidic bond with inversion, releasing water.
✓ Correct answer
D: Two beta-glucose monomers forming a 1-4 glycosidic bond with inversion, releasing water.
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