Which enzyme present in human saliva and pancreatic secretions hydrolyzes complex dietary starches into maltose disaccharides?
Answer and explanation
Correct answer: D. Alpha-amylase
- Step 1: Alpha-amylase cleaves internal alpha-1,4-glucosidic bonds in amylose and amylopectin polysaccharides. Step 2. Salivary amylase initiates starch digestion in the mouth, and pancreatic amylase completes it in the duodenum. Answer: Alpha-amylase. Why not the others: Pepsin digests proteins in acidic gastric juice; trypsin digests proteins in alkaline intestinal juice; lipase hydrolyzes fats.
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