how do polysaccharides that are used for energy storage and those that provide a structural role in cell different from one another

Question

anonymous · Answer

sugar (mono- and disaccharide) that is eaten or produced by the organism can be added up to long molecules in order to store it. 
in animals it is called glycogen. it looks like a net of saccharides added together. this is not only storage but also has some structural properties. the next step would be making fat out of this glycogen if there is too much.
in plants you get long chains of saccharides, called the starch. also storage and structural element. for example if you think of a potato which consists mostly of starch.
the other thing that plants do with polysaccharides is less a storage but even more a structural think: the cellulosis. which is what gives a plant the strength to lift up from the ground. wood is pure cellulosis for example.

anonymous · Answer

poly saccharides for energy storage is called glcycogen - it is stored in the liver, and only there. strtuctural poly-sac's may be found usually as ECM - extracellular matrix - like cartilage for example. . sugar groups may be attached to many proteins - usually in the golgi appartus.