Chymotrypsinogen is produced by

Options

A. Liver
B. Pancreas
C. Stomach
D. Duodenum

Answer

**Step-by-Step Solution:**

1. **Understanding Chymotrypsinogen**: Chymotrypsinogen is an inactive precursor (zymogen) of the enzyme chymotrypsin, which is involved in protein digestion.

2. **Identifying the Source**: To determine where chymotrypsinogen is produced, we need to look at the organs involved in digestion and enzyme production.

3. **Evaluating the Options**:
- **Option 1: Liver**: The liver is primarily responsible for producing bile, which aids in fat digestion, but it does not produce chymotrypsinogen. Therefore, this option is incorrect.
- **Option 2: Pancreas**: The pancreas produces pancreatic juice, which contains various digestive enzymes in their inactive forms, including chymotrypsinogen. This option is correct.
- **Option 3: Stomach**: The stomach produces gastric juices and enzymes like pepsin, but not chymotrypsinogen. Thus, this option is incorrect.
- **Option 4: Duodenum**: The duodenum is the first part of the small intestine where some enzymes are activated, but it does not produce chymotrypsinogen. This option is also incorrect.

4. **Conclusion**: After evaluating all options, we conclude that chymotrypsinogen is produced by the pancreas.

**Final Answer**: Chymotrypsinogen is produced by the pancreas.

---