sugars

Hello there, I was wondering about the fact that fructose's chain rings up as a furanose...is there any correlation between ketose sugars and furanose rings in general? In other words, do all ketoses form a furanose ring? Thanks!

Hello there, my chem teacher said in class that ONLY hexose sugars, like glucose, can be repeated several times to produce oligo or polysaccharides. The other monosaccharides (triose, tetrose, pentose,...) can not do the same but are important for the formation of carbohydrates derivatives...is...