Fructose exists as both pyranose and furanose structures.(a) True(b) FalseThis question was posed to me in unit test.Question is taken from Biomolecules Carbohydrates topic in section Biomolecules of Chemistry – Class 12

Fructose exists as both pyranose and furanose structures.(a) True(b) F

1.	Fructose exists as both pyranose and furanose structures.(a) True(b) FalseThis question was posed to me in unit test.Question is taken from Biomolecules Carbohydrates topic in section Biomolecules of Chemistry – Class 12
Answer» Correct option is (a) True The EXPLANATION is: In the free STATE, D-fructose exists as a six-membered ring (fructopyranose). HOWEVER, in the combined state as a constituent in DISACCHARIDES, it exists in FURANOSE form (five-membered hemiketal).

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