which of the following organism is useful in the preparation of requefort cheese

Options

A. Yeast
B. Bacteria
C. Protozoa
D. Fungi

Answer

To solve the question regarding which organism is useful in the preparation of Roquefort cheese, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which organism is specifically used in the preparation of Roquefort cheese.

2. **Identify the Type of Cheese**: Roquefort cheese is a type of blue cheese, known for its distinctive flavor and blue veins.

3. **Research the Ingredients**: Roquefort cheese is traditionally made using sheep's milk and is known for being inoculated with specific microorganisms.

4. **Identify the Microorganism**: The key microorganism used in the production of Roquefort cheese is *Penicillium roqueforti*, a type of fungus.

5. **Evaluate the Options**:
- A. Yeast: Generally used in bread and fermentation processes.
- B. Bacteria: While some cheeses use bacteria, Roquefort specifically uses a fungus.
- C. Protozoa: Not typically involved in cheese production.
- D. Fungi: This includes *Penicillium roqueforti*, which is indeed used in Roquefort cheese.

6. **Select the Correct Answer**: Based on the information gathered, the correct answer is D. Fungi.

### Final Answer:
**D. Fungi**