Cellulose and Starch Are Both Polymers of Glucose Units,but Most

question 20

Multiple Choice

Cellulose and starch are both polymers of glucose units,but most animals can only use starch as a source of carbohydrate in their diets.Why are most animals incapable of digesting cellulose?

• A)Starch contains α linkages between carbons 1 and 4,where as cellulose contains β linkages between carbons 1 and 2.
• B)The glucose units of cellulose are in the open chain form and cannot be hydrolyzed by the cyclic-sugar specific enzymes of animals.
• C)The polymer of cellulose is simply too long to be completely digested by animals.
• D)Most animals do not produce enzymes which are capable of hydrolyzing β linkages between cellulose.
• E)This statement is incorrect.Most animals can digest cellulose.

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