Match each polysaccharide with its defining structural characteristic:
Polysaccharides:
1. Amylose
2. Amylopectin
3. Glycogen
4. Cellulose
Structural Characteristics:
A. Rigid, unbranched polymer of glucose units joined by β(1→4)-glycosidic bonds
B. Linear helical polymer of glucose units joined primarily by α(1→4)-glycosidic bonds
C. Animal storage polysaccharide containing α(1→4) chains with frequent α(1→6) branch points occurring every 8–12 residues
D. Plant storage polysaccharide containing α(1→4) chains with occasional α(1→6) branch points occurring every 24–30 residues
Answer
1-B, 2-D, 3-C, 4-A
Explanation
Amylose is largely linear; amylopectin is branched; glycogen is a more highly and frequently branched animal storage polysaccharide; and cellulose is an unbranched structural polymer with β(1→4) linkages. **Key takeaway:** Linkage configuration and branching distinguish polysaccharides. **Glossary:** Glycosidic linkage: covalent bond joining sugar units.