Which of the following statements about carbohydrate digestion are true?

A. Amylopectin has 1-4 straight chains and 1-6 side chains.

C. Amylase breaks 1-4 glucose linkages.

E. An adult may ingest about 350 gm. of carbohydrate daily

F. Dietary starch contains two glucose polymers, amylopectin and amylase. 

DISCUSSION: Amylopectin, the most abundant constituent of starch, is a 1-4–linked straight chain of glucose molecules. In addition, amylopectin possesses a 1-6 branching side chain at approximately every 25 glucose units along the straight chain. Amylase has only 1-4 linkages of glucose molecules. Pancreatic and salivary amylase break the interior 1-4 glucose linkages.