Question

The monomer unit of amylopectin is

• A. amylose
• B. $\alpha \text{-}D\text{-}$ glucose
• C. $\alpha \text{-}L\text{-}$ glucose
• D. lactose

Answer 1

Answer: (B)

Amylopectin is branched chain polymer of $\alpha$ -D-glucose units, involving about 1000 or more units per molecule. It is insoluble in water. In amylopectin, chain is formed by $C_1$ and $C_2$ glycosidic linkage whereas branching occurs by $C_1$ and $C_6$ glycosidic linkage. (Structure of glycogen is similar to amylopectin and it is also highly branched).