Mycoplasma is a/an__________organism.

Options

A. obligate anaerobe
B. facultative aerobe
C. obligate aerobe
D. facultative anaerobe

Answer

To answer the question "Mycoplasma is a/an__________organism," we need to determine the type of organism Mycoplasma is based on its oxygen requirements.

### Step-by-Step Solution:

1. **Identify Mycoplasma**: Mycoplasma is a genus of bacteria known for being the smallest free-living organisms. They lack a cell wall, which distinguishes them from many other bacteria.

2. **Understand Oxygen Requirements**: Organisms can be classified based on their oxygen requirements into:
- **Obligate Aerobes**: Require oxygen to survive.
- **Obligate Anaerobes**: Cannot survive in the presence of oxygen.
- **Facultative Anaerobes**: Can survive with or without oxygen but prefer oxygen when available.
- **Facultative Aerobes**: Prefer oxygen but can survive without it.

3. **Research Mycoplasma's Oxygen Preference**: Mycoplasma species are known to be facultative anaerobes. This means they can survive in both the presence and absence of oxygen, although they do not require oxygen for their growth.

4. **Fill in the Blank**: Based on the above understanding, we can conclude that Mycoplasma is a facultative anaerobic organism.

### Final Answer:
Mycoplasma is a facultative anaerobic organism.

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