Humans can digest starch but not cellulose because ________.
A) humans have enzymes that can hydrolyze the α-glycosidic linkages of starch but not the β-glycosidic linkages of cellulose
B) starch monomers are joined by covalent bonds, and cellulose monomers are joined by ionic bonds
C) the monomer of starch is glucose, while the monomer of cellulose is galactose
D) Starch is softer than cellulose

Question

Quizplus · Accepted Answer

Humans have enzymes called amylases, which can hydrolyze the α-glycosidic linkages in starch to break it down into glucose molecules. However, humans lack enzymes that can break down the β-glycosidic linkages in cellulose, which makes it indigestible for us.

Humans Can Digest Starch but Not Cellulose Because ________