In which one of the following groups, all the three are examples of polysaccharides?

Options

A. Starch, glycogen, cellulose
B. Sucrose, maltose, glucose
C. Glucose, fructose, lactose
D. Galactose, starch, sucrose

Answer

A

Explanation

Starch and glycogen are storage polysaccharide and cellulose is a structural polysaccharide. Starch has straight chain of 1,4 `alpha`-D pyranose glucose units and side chains or amylopectin part of 2-200 thousand glucose units that are attached to straight chains by 1,6 `alpha`-D glycosidic bonds. Glycogen is long chain branched polymer of 5-300 thousand glucose units, straight chain linked by `alpha`-D 1-4 glycosidic bonds and side chains through `alpha`-D 1 `rarr` 6 glycosidic bonds. Cellulose, a fibrous polysaccharide has a linear chain of 6-10 thousand 1 `rarr` 4 linked `beta`-pyranose glucose chain.