Which enzyme in pancreatic juice breaks down protein molecules?

• A. Amylase
• B. Nuclease
• C. Tryspin
• D. Lipase

Answer: (C)

This question tests which pancreatic enzyme digests proteins. Protein digestion relies on proteases, and the enzyme that cleaves peptide bonds in proteins is trypsin. Amylase targets carbohydrates like starch, nuclease targets nucleic acids, and lipase targets fats. In the digestive system, trypsin is secreted in an inactive form (trypsinogen) by the pancreas and is activated in the small intestine, where it cleaves peptide bonds, helping to break proteins into smaller peptides. This makes it the correct choice.