Enzymes and nutrient absorption Knowledge-Based Download PDF

Questions

1. 1.

   Which pancreatic exopeptidase hydrolyzes peptide bonds at the carboxyl terminus of polypeptide chains to yield free amino acids for absorption in the small intestine?

   • A) Carboxypeptidase
   • B) Pepsin
   • C) Chymotrypsin
   • D) Trypsin
2. 2.

   Which enzyme secreted by the pancreas hydrolyzes dietary starch into maltose, maltotriose, and $\alpha$-limit dextrins prior to terminal digestion and monosaccharide absorption in the small intestine?

   • A) Pepsin
   • B) Trypsin
   • C) Pancreatic amylase
   • D) Enteropeptidase
3. 3.

   Which duodenal brush-border enzyme converts inactive trypsinogen into active trypsin, initiating the enzymatic cascade necessary for dietary protein breakdown and amino acid absorption?

   • A) Enteropeptidase
   • B) Chymotrypsin
   • C) Pepsin
   • D) Carboxypeptidase
4. 4.

   Which brush-border enzyme hydrolyzes dietary disaccharides into glucose and galactose to enable their absorption across the intestinal epithelium?

   • A) Maltase
   • B) Sucrase
   • C) Salivary amylase
   • D) Lactase
5. 5.

   Which enzyme hydrolyzes dietary triglycerides into monoglycerides and free fatty acids to facilitate their absorption across the intestinal epithelium?

   • A) Salivary amylase
   • B) Pepsin
   • C) Trypsin
   • D) Pancreatic lipase