which of the following groups are all classified as polysaccharide
Answers
Starch, glycogen and cellulose are all polysaccharides. Starch is a glucosan homopolysaccharide which is the main reserve food of plants. Glycogen is also a glucosan homopoly- saccharide which is the major reserve food of fiingi, animals and some bacteria. It is also called animal starch.
Answer:
Polysaccharides - These are complex carbohydrates, formed by the polymerisation of monosaccharide monomers.
Homopolysaccharides and heteropolysaccharides are formed by the polymerisation of only one and different kinds of monosaccharide monomers, respectively.
Examples of homopolysaccharides are fructan (fructose monomers), galactan (galactose monomers), etc.
Examples of heteropolysaccharides are chitin, peptidoglycan, etc.
Different groups of polysaccharides are -
a) Food storage polysaccharides (starch, glycogen, and inulin)
1. Starch - It has two components; amylose, and amylopectin. Both are formed by the condensation of α-D-glucose.
2. Glycogen - It is known as animal starch, and is stored in the liver. It has glucose residues only, which are joined by the 1-4α and 1-6 linkages.
b) Structural polysaccharides (chitin and cellulose)
1. Chitin - It is the second most abundant organic substance. Its monomers are N-acetyl glucosamine.
2. Cellulose - It is the most abundant organic substance. Glucose residues are joined by 1-4 β linkage
c) Mucosubstances (pectin, hemicellulose, peptidoglycan, and lipopolysaccharide)
1. Peptidoglycan - It is formed by the polymerisation of NAG (N-acetyl glucosamine) and NAM (N-acetyl muramic acid).
#SPJ2