Digestive Enzymes During digestion, four different groups of molecules are commonly encountered. Each is broken down into its molecular components by specific enzymes: Complex carbohydrates, or polysaccharides (such as starches), are broken down into oligosaccharides (consisting of two to ten linked monosaccharides), disaccharides (such as maltose), or individual monosaccharides (such as glucose or fructose). Enzymes called amylases break down starch. • Proteins are broken down into short chains of amino acids (peptides) or individual
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