BIO NMDCAT Carbohydrates

nmdcat.online June 27, 2026

The structural difference between amylose and amylopectin, the two components of starch, is that amylopectin possesses

A. A linear, unbranched chain of glucose units only

B. A higher proportion of β-1,4 glycosidic linkages

C. Branch points formed by α-1,6 glycosidic bonds in addition to α-1,4 linkages

✓

D. A triple helical structure that makes it water-insoluble

📝 Explanation

Amylose is a linear, helical polymer of glucose linked by α-1,4 bonds. Amylopectin is a highly branched polymer with an α-1,4 linked backbone and α-1,6 glycosidic bonds at branch points occurring approximately every 24-30 glucose units.

📖 Additional Information

A linear, unbranched chain of glucose units only
A higher proportion of β-1,4 glycosidic linkages
Branch points formed by α-1,6 glycosidic bonds in addition to α-1,4 linkages
A triple helical structure that makes it water-insoluble

Amylose is a linear, helical polymer of glucose linked by α-1,4 bonds. Amylopectin is a highly branched polymer with an α-1,4 linked backbone and α-1,6 glycosidic bonds at branch points occurring approximately every 24-30 glucose units.

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