Infoldings of plasma membrane in bacteria are called as :-

Options

A. Episomes
B. Plasmid
C. Pili
D. Mesosomes

Answer

To answer the question "Infoldings of plasma membrane in bacteria are called as:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Bacteria**:
- Bacteria are prokaryotic cells, meaning they lack a defined nucleus and membrane-bound organelles. They have a simpler structure compared to eukaryotic cells.

2. **Identify the Options Given**:
- The options provided are:
A. Epizome
B. Plasmid
C. Pili
D. Mesosome

3. **Analyze Each Option**:
- **Option A: Epizome**: This refers to an extra-chromosomal DNA structure, not related to the plasma membrane.
- **Option B: Plasmid**: Similar to epizomes, plasmids are also extra-chromosomal DNA and do not represent infoldings of the plasma membrane.
- **Option C: Pili**: These are hair-like structures on the surface of bacteria that help in attachment and conjugation, but they are not infoldings of the plasma membrane.
- **Option D: Mesosome**: This is the correct answer. Mesosomes are infoldings of the plasma membrane in bacteria and are involved in various cellular processes, including respiration.

4. **Conclusion**:
- Based on the analysis, the correct answer is **D. Mesosome**.

### Final Answer:
Infoldings of plasma membrane in bacteria are called **mesosomes**.

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