Amylopectin is composed of:

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Question:
Amylopectin is composed of:

$\alpha-D-$ glucose,$C_{1}-C_{4}$ and $C_{1}-C_{6}$ linkages
$\beta$-D-glucose, $\mathrm{C}_{1}-\mathrm{C}_{4}$ and $\mathrm{C}_{2}-\mathrm{C}_{6}$ linkages
$\beta$-D-glucose, $C_{1}-C_{4}$ and $C_{1}-C_{6}$ linkages
$\alpha$-D-glucose, $\mathrm{C}_{1}-\mathrm{C}_{4}$ and $\mathrm{C}_{2}-\mathrm{C}_{6}$ linkages

Correct Option: 1

Solution:

Starch is a polymer of $\alpha$-D-glucose. It has two components.

(i) Amylose which has only $\alpha-1,4-g$ lycosidic linkage and is a linear polymer.

(ii) Amylopectin which has $\alpha-1,6$-glycosidic linkage in addition to $\alpha-1,4-g$ lycosidic linkage and is a cross-linked polymer.