Cytoskeleton is absent in

Options

A. Bacteria and blue green algae
B. Mycoplasma and blue green algae
C. Bacteria and mycoplasma
D. Bacteria , Mycoplasma and blue green algae

Answer

### Step-by-Step Solution:

1. **Understand the Cytoskeleton**: The cytoskeleton is an elaborate network of proteinaceous structures found in the cytoplasm of cells. It plays a crucial role in maintaining the cell's shape, providing mechanical support, and facilitating cell motility.

2. **Identify Types of Cells**: Cells are broadly classified into two categories: prokaryotic and eukaryotic. Prokaryotic cells do not have membrane-bound organelles, while eukaryotic cells do.

3. **Know Where Cytoskeleton is Present**: The cytoskeleton is primarily present in eukaryotic cells. This includes cells from organisms such as plants, animals, fungi, and protists.

4. **Identify Prokaryotic Organisms**: Prokaryotic organisms include bacteria, mycoplasma, and blue-green algae (also known as cyanobacteria). These organisms lack a cytoskeleton.

5. **Conclusion**: Since the cytoskeleton is absent in prokaryotic organisms, the correct answer to the question "Cytoskeleton is absent in" is: **Bacteria, Mycoplasma, and Blue-Green Algae**.

### Final Answer:
Cytoskeleton is absent in **Bacteria, Mycoplasma, and Blue-Green Algae**.

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