In mammals, trypsin enzyme is formed from the

Options

A. trypsinogen by the action of enterokinase
B. trypsinogen by the action of protein
C. trypsinogen by the action of fat
D. trypsinogen by the action of HCl

Answer

**Step-by-Step Solution:**

1. **Understanding Trypsin**: Trypsin is an enzyme that plays a crucial role in the digestion of proteins in mammals. It is secreted as part of the pancreatic juice.

2. **Inactive Form of Trypsin**: In mammals, trypsin is initially produced in an inactive form known as trypsinogen (not trypsinosin, which seems to be a mispronunciation in the transcript). This is a protective mechanism to prevent the enzyme from digesting proteins in the pancreas itself.

3. **Activation of Trypsinogen**: The inactive trypsinogen is activated in the small intestine. This activation is facilitated by another enzyme called enterokinase (also referred to as enteropeptidase), which is secreted by the cells of the small intestine.

4. **Conversion to Active Trypsin**: Enterokinase converts trypsinogen into its active form, trypsin. Once activated, trypsin can then help in the digestion of proteins by breaking them down into smaller peptides.

5. **Conclusion**: Therefore, in mammals, trypsin is formed from trypsinogen by the action of the enzyme enterokinase.

**Final Answer**: In mammals, trypsin enzyme is formed from trypsinogen by the action of enterokinase.

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