Enzymes That Readily Break Starch Apart Cannot Hydrolyze the Glycosidic

question 18

Multiple Choice

Enzymes that readily break starch apart cannot hydrolyze the glycosidic linkages found in cellulose. Why is this logical?

• A) The geometry of the bonds is different, and the shapes of enzyme active sites are highly specific.
• B) Starch is held together by hydrogen bonding, not covalent bonding.
• C) Cellulose molecules are highly branched, and enzymes are too bulky to fit.
• D) Starch is held together by peptide bonds, not glycosidic linkages.

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