JEE Main · 2025 · 29 Jan 2025 · Shift 1 · Biomolecules

Amylose is the unbranched component of starch, its glucose units joined by $\alpha \text{-}1,4$ glycosidic bonds, found in plants. Cellulose is also unbranched but its glucose units are linked by $\beta \text{-}1,4$ bonds, and it too comes from plants. Glycogen is the branched storage polysaccharide of animals, built on $\alpha \text{-}1,4$ chain linkages. Amylopectin is the branched component of plant starch, combining $\alpha \text{-}1,4$ chain linkages with $\alpha \text{-}1,6$ branch points.

So Amylose pairs with plain $\alpha \text{-}{C}_1\text{-}{C}_4$, plant; Cellulose with $\beta \text{-}{C}_1\text{-}{C}_4$, plant; Glycogen with $\alpha \text{-}{C}_1\text{-}{C}_4$, animal; Amylopectin with $\alpha \text{-}{C}_1\text{-}{C}_4$, $\alpha \text{-}{C}_1\text{-}{C}_6$, plant.