The wall of Rhizopus hypha is composed of

Options

A. Cellulose
B. Chitin
C. Pectin
D. Hemicellulose.

Answer

### Step-by-Step Solution:

1. **Identify the Organism**: The question asks about the wall composition of Rhizopus hypha. Rhizopus is a genus of fungi, specifically known for being saprophytic, meaning they feed on dead and decaying organic matter.

2. **Understand Hypha Structure**: Hyphae are the long, filamentous structures that make up the body of fungi. They are multicellular and consist of cells that are surrounded by a tubular cell wall.

3. **Composition of Fungal Cell Walls**: The cell walls of fungi, including Rhizopus, are primarily made up of a structural polymer. In the case of Rhizopus, this polymer is known as chitin.

4. **Differentiate Between Options**: The question provides four options: cellulose, chitin, pectin, and hemicellulose.
- **Cellulose**: Found in plant cell walls.
- **Pectin**: Also a component of plant cell walls.
- **Hemicellulose**: Another component of plant cell walls.
- **Chitin**: The correct answer, as it is a key component of fungal cell walls.

5. **Conclusion**: Based on the information about the structure of Rhizopus hyphae and the composition of fungal cell walls, the correct answer is **chitin**.

### Final Answer:
The wall of Rhizopus hypha is composed of **chitin**.