Amylase is an enzyme that breaks down starch. Why can the same enzyme not break down cellulose?

• A. The enzyme cannot attack cellulose because of its helical shape.
• B. Cellulose molecules are much too large.
• C. Starch is made of glucose; cellulose is made of fructose.
• D. The bonds between the monosaccharide monomers in cellulose are much stronger.
• E. The monosaccharide monomers in cellulose are bonded together differently than those in starch.