Torulopsis utils is

Options

A. a microorganism that yields third gen- eration vaccines
B. a food yeast
C. an important intestinal commensal
D. employed for the citric acid synthesis

Answer

### Step-by-Step Solution:

1. **Identify the Organism**: The question asks about "Torulopsis utilis". This organism is also known as "Candida utilis".

2. **Classification**: Torulopsis utilis is classified as a species of yeast. It is important to note that it belongs to the fungal kingdom.

3. **Uses of Torulopsis utilis**:
- It is primarily used as a food yeast.
- It serves as a flavoring agent in processed foods and pet food.
- It is not known for yielding vaccines or being an intestinal commensal.

4. **Source of Growth**: Torulopsis utilis is typically grown on wood liquor, which is a byproduct of paper production. This medium is rich in wood sugars, which the yeast utilizes for growth.

5. **Evaluate the Options**:
- **Option A**: "A microorganism that yields third-generation vaccines" - This is incorrect.
- **Option B**: "Food yeast" - This is correct.
- **Option C**: "An important intestinal commensal" - This is incorrect.
- **Option D**: "Employed for citric acid synthesis" - This is also incorrect.

6. **Conclusion**: Based on the information, the correct answer is that Torulopsis utilis is a food yeast.

### Final Answer:
**Torulopsis utilis is a food yeast.**

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