Question

What is common about amylase, trypsin and pepsin?

• A. These are produced in the stomach
• B. These act at pH lower than 7
• C. These all are proteins
• D. These all are proteolytic enzymes

Answer 1

The correct option is C

These all are proteins

Only the enzyme pepsin is produced in the stomach. Trypsin is secreted in pancreas and amylase is secreted in the mouth. The different enzymes act at different pH. For example, pepsin is active at pH 1.5 - to 1.6. All enzymes are proteins but all proteins are not enzymes. Hence the correct option is C.