Protein present in silk fibre is

Options

A. Elastin
B. Fibroin
C. Casein
D. Keratin

Answer

**Step-by-Step Text Solution:**

1. **Identify the Source of Silk Fiber**: Silk fiber is produced by the silkworm, which is the larval stage of the silk moth (Bombyx mori).

2. **Understand the Composition of Silk Fiber**: The primary component of silk fiber is a protein.

3. **Name the Protein**: The specific protein that makes up silk fiber is called fibroin.

4. **Conclusion**: Therefore, the protein present in silk fiber is fibroin.

**Final Answer**: The protein present in silk fiber is fibroin.

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