Penicillium roquefortii and P.camembertii are used in the preparation of cheese. These fungi belong to class :-

Options

A. Zygomycetes
B. Oomycetes
C. Deuteromycetes
D. Ascomycetes

Answer

To determine the class to which Penicillium roqueforti and Penicillium camemberti belong, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organisms**: The question mentions two fungi: Penicillium roqueforti and Penicillium camemberti. Both are used in cheese preparation.

2. **Understand the Classification**: Fungi are classified into various classes. The options provided are:
- Zygomycetes
- Oomycetes
- Deuteromycetes
- Ascomycetes

3. **Research the Genus**: Both Penicillium roqueforti and Penicillium camemberti belong to the genus Penicillium.

4. **Determine the Class**:
- Zygomycetes are known as pin molds and thrive in soil and decaying plant material.
- Oomycetes are water molds and are associated with plant diseases.
- Deuteromycetes are referred to as imperfect fungi, which do not have a known sexual reproduction stage.
- Ascomycetes are known as sac fungi, characterized by the formation of a sac-like structure called an ascus, which contains spores.

5. **Conclusion**: Since Penicillium is known to belong to the class Ascomycetes, the correct answer is Ascomycetes.

### Final Answer:
Penicillium roqueforti and P. camemberti belong to the class **Ascomycetes**.

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