Name the polymer in which chains are formed by α -1,4-glycosidic...

Amylopectin is a branched-chain polymer of $\alpha$-D-glucose units.

The linear chain is formed by $\alpha$-1,4-glycosidic linkages between the $\alpha$-D-glucose units.

The branching occurs through $\alpha$-1,6-glycosidic linkages.

Amylose is a linear polymer with only $\alpha$-1,4-glycosidic linkages.

Cellulose is a linear polymer of $\beta$-D-glucose units with $\beta$-1,4-glycosidic linkages.

Starch is a mixture of both amylose and amylopectin.

Answer: Amylopectin