Concept:Cells that produce protein-digesting enzymes must protect themselves from being digested by their own secretions. Enzymes that digest safe materials don't need this protection.
Solution:- Proteases (like trypsin, pepsin, and chymotrypsin) are highly dangerous to the cells that produce them because cells are made of proteins. Thus, they are secreted as inactive zymogens (-ogens).
- Amylase, however, digests starch (carbohydrates). Since the salivary glands and pancreas are not made of starch, amylase poses no threat to the internal cellular machinery.
- Therefore, amylase can be safely secreted completely in its active form.
Why other options are incorrect:Trypsin, Pepsin, and Chymotrypsin are all proteases secreted as inactive trypsinogen, pepsinogen, and chymotrypsinogen, respectively.
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