<P> Not yet formally proposed as an essential macronutrient (as of 2005), dietary fiber is nevertheless regarded as important for the diet, with regulatory authorities in many developed countries recommending increases in fiber intake . </P> <P> Starch is a glucose polymer in which glucopyranose units are bonded by alpha - linkages . It is made up of a mixture of amylose (15--20%) and amylopectin (80--85%). Amylose consists of a linear chain of several hundred glucose molecules and Amylopectin is a branched molecule made of several thousand glucose units (every chain of 24--30 glucose units is one unit of Amylopectin). Starches are insoluble in water . They can be digested by breaking the alpha - linkages (glycosidic bonds). Both humans and animals have amylases, so they can digest starches . Potato, rice, wheat, and maize are major sources of starch in the human diet . The formations of starches are the ways that plants store glucose . </P> <P> Glycogen serves as the secondary long - term energy storage in animal and fungal cells, with the primary energy stores being held in adipose tissue . Glycogen is made primarily by the liver and the muscles, but can also be made by glycogenesis within the brain and stomach . </P> <P> Glycogen is analogous to starch, a glucose polymer in plants, and is sometimes referred to as animal starch, having a similar structure to amylopectin but more extensively branched and compact than starch . Glycogen is a polymer of α (1 → 4) glycosidic bonds linked, with α (1 → 6) - linked branches . Glycogen is found in the form of granules in the cytosol / cytoplasm in many cell types, and plays an important role in the glucose cycle . Glycogen forms an energy reserve that can be quickly mobilized to meet a sudden need for glucose, but one that is less compact and more immediately available as an energy reserve than triglycerides (lipids). </P>

Where is the energy in a polysaccharide stored