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Question: Amylopectin is a polymer of (A) \(\alpha -D\) glucose (B) \(\alpha -D\) fructose (C) Lactose ...

Amylopectin is a polymer of
(A) α−D\alpha -D glucose
(B) α−D\alpha -D fructose
(C) Lactose
(D) Amylose

Explanation

Solution

Polymer is a substance consisting of a large number of molecules or macromolecules and composed of many repeating units.
Example. silk, wool, DNA, cellulose, proteins are all natural polymers.

Complete step by step answer:
Amylopectin is polysaccharide and a highly branched polymer. They are found in plants.
Amylopectin is one of the two important components of starch. It is water soluble.
The repeating unit in Amylopectin is α−D−\alpha - D - glucose.
α−D−\alpha - D - glucose units are linked in a linear way with C1→C4{C_1} \to {C_4} glycosidic bonds.
A glycosidic linkage is a covalent bond that allows the linking of two monosaccharides together.
Amylopectin contributes about 80% of starch α−D−\alpha - D - glucose linked C1−C4{C_1} - {C_4} atoms through glycosidic linkage branching occurs by the formation of glycosidic linkage betweenC1{C_1} of oneα−D−\alpha - D - glucose and C6{C_6} of another α−D−\alpha - D - glucose unit.

Linkage between two monosaccharide molecules through oxygen is called glycosidic linkage.

Therefore, by the above explanation, the correct option is [A]

Note: Polysaccharides have a large number of same or different monosaccharides, linked together by glycosidic linkage. They have molecular formula (C6H10O5)n{({C_6}{H_{10}}{O_5})_n}
Another part of starch is Amylose. This is a water soluble part of starch.