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Module 1: Hidratos de carbono

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Polisacáridos (carbohidratos complejos)

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Chemistry - Polysaccharides (complex carbohydrates)

Polysaccharides (complex carbohydrates)

There are three main polysaccharides: - starch and cellulose (which are
produced in plants) and glycogen (which is produced in our bodies). All
three are of glucose. The formation of a condensation polymer of glucose,
can be represented by the structural equation:

This emphasises the reaction between hydroxy functional groups -OH on
adjacent glucose molecules, resulting in the formation of ether, (C)-O-(C),
links accompanied by the release of H20 molecules during the condensation
process.

Cellulose is, like starch, a condensation polymer of glucose, formed in
plants. but, while the basic role of starch in plants (and glycogen [1] in
our bodies) is the storage of carbohydrate (and energy), cellulose is a
structural material that forms cell walls. The differences in structure
between cellulose and starch are subtle, with each alternate glucose unit
effectively rotated vertically through 180 degrees.

However, these structural differences are subtle enough for us to be able
to digest starch but not cellulose. The enzymes that control the digestion
of starch have no effect on cellulose. Starch and cellulose both play a
role in our diet. is indigestible, is digestible, and a

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