Which of the following is not produced by the brush border cells of the intestinal mucosa.

Options

A. dipeptidases
B. nucleosidases
C. lipases
D. staeapsin

Answer

To answer the question "Which of the following is not produced by the brush border cells of the intestinal mucosa?" we will analyze each option provided:

1. **Understanding Brush Border Cells**:
- Brush border cells are specialized epithelial cells located in the small intestine. They have microvilli that increase the surface area for absorption and contain enzymes that aid in digestion.

2. **Evaluating the Options**:
- **A. Dipeptidase**: This enzyme is produced by brush border cells. It helps in the digestion of dipeptides into amino acids.
- **B. Nucleosidase**: This enzyme is also produced by brush border cells. It assists in the breakdown of nucleotides into nucleosides.
- **C. Lipase**: This enzyme is produced by brush border cells as well. It aids in the digestion of fats.
- **D. Strepsin**: This option is incorrect. Strepsin (more commonly known as trypsin) is an enzyme produced by the pancreas, not by the brush border cells.

3. **Conclusion**:
- The enzyme that is not produced by the brush border cells of the intestinal mucosa is **D. Strepsin**.

### Summary of the Solution:
- The correct answer is **D. Strepsin** as it is produced by the pancreas and not by the brush border cells of the intestinal mucosa.