Filament , hook and basal body are the parts of

Options

A. Flagella in prokaryotes
B. Flagella in eukaryote
C. Fimbriae
D. Flagella in both eukaryotes and prokaryotes

Answer

To solve the question "Filament, hook, and basal body are the parts of," we need to analyze the components mentioned and their relevance to biological structures.

### Step-by-Step Solution:

1. **Identify the Components**: The question lists three components: filament, hook, and basal body. We need to determine which biological structure these components belong to.

2. **Understand the Function**: The filament, hook, and basal body are associated with motility in cells. These components are crucial for the movement of certain microorganisms.

3. **Differentiate Between Prokaryotic and Eukaryotic Structures**:
- **Prokaryotic Flagella**: In prokaryotes (like bacteria), the flagella are made up of these three parts. The filament is the long, whip-like structure that extends out from the cell, the hook connects the filament to the basal body, and the basal body anchors the flagellum to the cell wall and membrane.
- **Eukaryotic Flagella**: Eukaryotic flagella have a different structure, primarily made up of microtubules arranged in a "9+2" formation, and do not have the same components as prokaryotic flagella.

4. **Conclusion**: Given that filament, hook, and basal body are specifically parts of the flagella in prokaryotes, the correct answer to the question is "flagella in prokaryotes."

### Final Answer:
Filament, hook, and basal body are the parts of **flagella in prokaryotes**.

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