Which Of The Following Carbohydrates Is A Polysaccharide

Which Of The Following Carbohydrates Is A Polysaccharide –  Polysaccharide are high molecular weight biological molecules which can be nearly pure carbohydrate. they’re built by using animals and plants from less difficult, monosaccharide molecules. Which monosaccharide units are covalently joined via an O-glycosidic bond in both a branched or linear configuration. Polysaccharides serve as shops of energy, as in glycogen (branched polysaccharide of glucose), and as a structural factor of bacterial cell partitions, as in cellulose. In some of the biggest polysaccarhide systems there may be 10,000 individual units joined together. There is a large diversity of polysaccharide form.

 

Which Of The Following Carbohydrates Is A Polysaccharide
Which Of The Following Carbohydrates Is A Polysaccharide

 

Which Of The Following Carbohydrates Is A Polysaccharide – There are two forms of polysaccharides: homo-polysaccharides and hetero-polysaccharides. A homo-polysaccharide is defined to have simplest one form of monosaccharide repeating inside the chain; whereas, a hetero-polysaccharide is composed of two or extra sorts of monosaccharides. In both kinds of polysaccharide, the monosaccharide can link in a linear style or they could department out into complicated formations. It should additionally be referred to that for a polysaccharide to be taken into consideration acidic it have to contain one or more of the following groups: phosphate, sulfuric, or carboxyl.

Which Of The Following Carbohydrates Is A Polysaccharide – List of Polysaccharides

Starch

A word that comes from old English and means to stiffen, is also a polysaccharide made in vegetation. it is in the main an strength storage molecule, or fuel, for the plant and for its seeds. it’s far the storage polysaccharide of most flowers. human beings achieve it from cereal grains (e.g., rice, wheat), legumes (pea, gram, beans), potato, tapioca, banana etc. it’s miles polyglucan homosaccharide and is shaped as an quit fabricated from photosynthesis. Starch is saved both inner chloro­plasts or unique leucoplasts referred to as amyloplasts. Starch oc­curs in the form of microscopic granules known as starch grains.

Starch grains might also arise singly or in organizations. the 2 kinds are known as simple and compound starch grains. Starch grains can be rounded, oval, polygonal or rod fashioned in define (Fig. nine.6). every grain has a number of shells or layers arranged in con­centric or eccentric fashion round a proteinaceous point called hilum.

Glycogen

It is the polysaccharide food reserve of animals, bacteria and fungi. is also made by linking together glucose molecules. Like starch, it is used by animals to store sugar and provide energy. It is similar to amylopectin in structure, but branched with a C1-to-C6 glycosidic bond about every ten glucose units. It has about 30,000 glucose residues and a molecular weight of about 4.8 million. Glucose residues are arranged in a highly branched bush like chains.

Inulin

It is a fructan storage polysaccharide of roots and tubers of Dahlia and related plants. Inulin is not metabolized in human body and is readily filtered through the kidney. It is, therefore, used in testing of kidney function, especially glomerular filtration.

Chitin and Chitosan

Chitin is a non-digestible carbohydrate extracted from the shells of crabs, lobsters, shrimps, Antarctic krills or other crustaceans. It is made of acetylated glucosamine molecules linked by beta-1,4 glycosidic bonds.

Chitin is a complex carbohydrate of heteropolysaccharide type which is found as the structural component of fungal walls and exoskeleton of arthropods. In fungal walls, chitin is often known as fungus cellulose. Chitin is soft and leathery. Therefore, it provides both strength and elasticity. It becomes hard when impregnated with certain proteins and calcium carbonate.

Chitosan is naturally or synthetically produced by deacetylation of chitin. In the human intestine, chitin and chitosan act as a viscous insoluble fiber. They are partly degraded by normal colonic bacteria into glucosamine.

Cellulose

It is fibrous homopolysaccharide of high tensile strength which forms a structural element of cell wall in all plants, some fungi and protists. Tunicin of tunicates (=ascidians) is related to cellulose (also called animal cellulose).

In absolute terms, cellulose is the most abundant organic substance of the biosphere forming 50% of carbon found in plants. Cotton fibres have about 90% of cellulose while wood contains 25-50% cellulose. The other materials of the cell wall include lignin, hemicellulose, pectins, wax, etc.

Cellulose molecules have un-branched and linear chains unlike the branched and helical chains of starch and glycogen. A chain of cellulose molecule contains 6000 or more glucose residues.

Hemicellulose

Hemicellulose is a collective term for non-digestible polysaccharides found in plant cell walls; it is composed of various monosaccharides, like xylose, mannose, galactose, rhamnose and arabinose. Hemicellulose is a dietary fiber, which can be either soluble or insoluble and more or less fermentable.  Hemicellulose can be used in foods as an added fiber, thickener, emulsifier or stabilizer. Hemicellulose may be part of prebiotic supplements.

Polydextrose

Polydextrose (PDX) is a synthetic low-calorie carbohydrate, a polysaccharide composed of D-glucose (dextrose) and sorbitol, which are derived from cornstarch, and citric or phosphoric acid Polydextrose is a soluble fiber.

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