Match the following structural characteristics to the polysaccharides amylose, a

Question

Match the following structural characteristics to the polysaccharides amylose, amylopectin, glycogen, and cellulose (a characteristic may fit more than one). contains both alpha (1 rightarrow 4) and alpha (1 rightarrow 6) glycosidic linkages is composed of glucose monosaccharide units. contains acetal linkages between monosaccharide units is composed of highly branched molecular chains is composed of unbranched molecular chains contains only (1 rightarrow 4) glycosidic linkages contains only beta (1 rightarrow 4)

Explanation / Answer

Starch is a mixture of two polymers: amylose and amylopectin. Natural starches consist of about 10%–30% amylase and 70%–90% amylopectin. Amylose is a linear polysaccharide composed entirely of D-glucose units joined by the -1,4-glycosidic linkages.

Amylopectin is a branched-chain polysaccharide composed of glucose units linked primarily by -1,4-glycosidic bonds but with occasional -1,6-glycosidic bonds, which are responsible for the branching.

Glycogen is a branched biopolymer consisting of linear chains of glucose residues with further chains branching off every 8 to 12 glucoses or so. Glucoses are linked together linearly by (14) glycosidic bonds from one glucose to the next. Branches are linked to the chains from which they are branching off by (16) glycosidic bonds between the first glucose of the new branch and a glucose on the stem chain.

Cellulose is an organic compound with the formula (C6H10O5)n, a polysaccharide consisting of a linear chain of several hundred to many thousands of (14) linked D-glucose units. Cellulose is a straight chain polymer: unlike starch, no coiling or branching occurs, and the molecule adopts an extended and rather stiff rod-like conformation, aided by the equatorial conformation of the glucose residues.

a) contains both alpha(1-->4) an alpha(1-->6) glycosidic linkase: Amilopectins and glycogen

b) Is compose of glucose monosachharide units: Glycogen, Amylose, Amtlopectins, Cellulose

c) Contains acetal linkage between monosaccharie units: non of these polymer contains acetal linkage

d) compose of highly branch chains: Glycogen is extensively branched than starch.

e) compose of unbranched molecular chains: Cellulose

f) contains only (1--4) glycosidic linkage: Cellulose contains beta(1-->4) linkage while amylose conains alpha(1-->4) linkage,

g) contains only beta(1-->4): Cellulose contains only beta(1-->4)

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