BIOLOGY
POLYSACCHARIDES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Polypeptide chain of amino acids
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Repeating units of a simple sugar
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Polymer of fatty acids attached to phosphate groups
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Polymer of nitrogenous bases attached to phosphate groups
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Detailed explanation-1: -Starch molecules are polymer with repeating glucose units.
Detailed explanation-2: -Starch is comprised principally of two glucose polymers, amylose and amylopectin. Both polymers are made up of d-glucose units in cyclic pyranose form, linked through glycosidic bonds between carbons 1 and 4 of adjacent glucose monomers (Figure 1). The asymmetric carbon 1 is in rather than configuration.
Detailed explanation-3: -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%).
Detailed explanation-4: -For example starch is poly(glucose) formed by repeating glucose units. Glycosidic bond: A covalent bond joining a sugar molecule to another molecule. Starch is formed by successive glycosidic bonds between glucose molecules forming polymer chains.