Biomolecules

Fructose exists as a five membered ring named furanose.

Glucose gives Saccharic acid on reaction with $\mathrm{Br}_2$ water.

Amylose is a water insoluble branched chain polymer of $\alpha-D-(-)$-glucose.

Cellulose is a branched chain polysaccharide having only $\propto$-D-glucose units.