Which of the following statements are correct about the structure of starch:

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It is a polymer of $α - D (+)$ glucose linked through $α$ - glycosidic bond.

It consists of water soluble long unbranched chain of amylose.

It consists of water insoluble branched amylopectin having $C_{1} - C_{4}$ and $C_{1} - C_{6}$ glycosidic linkage between $α - D$ glucose.

In animal body it is stored in the form of glycogen, also known as animal starch

answer is A, B, C, D.

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Detailed Solution

Amylose It is a straight-chain polymer of D-glucose units Constitutes 20% of starch It is soluble in water Straight chain structure It contains $α - 1$ ,4-glycosidic bonds between two glucose units
Amylopectin It is a branched-chain polymer of D-glucose units. Constitutes 80% of starch. It is insoluble in water. Branched structure. It contains α-1,4-glycosidic bonds between two glucose units in the straight chain and $α - 1$ ,6-glycosidic bonds at the branching

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