The arthropod exoskeleton is formed of

Options

A. Several kinds of polysaccharides
B. Serveral kinds of proteins
C. Layers of proteins and chitin
D. Single complex protein called arthropotin.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the composition of the arthropod exoskeleton. Arthropods are a diverse group of invertebrates that include insects, arachnids, and crustaceans.

2. **Identifying the Components**: The exoskeleton of arthropods is known for being tough and resilient. It primarily consists of specific materials that provide structural support and protection.

3. **Key Components of the Exoskeleton**: The main component of the exoskeleton is chitin, which is a type of polysaccharide. Chitin is the most abundant organic constituent in the exoskeleton of arthropods.

4. **Analyzing the Options**:
- **Option A**: Several kinds of polysaccharides - This is incorrect because while chitin is a polysaccharide, it is not accurate to say the exoskeleton is made up of several kinds of polysaccharides.
- **Option B**: Several kinds of proteins - This is also incorrect as the exoskeleton is not solely made up of various proteins.
- **Option C**: Layers of protein and chitin - This is the correct answer, as the exoskeleton is indeed composed of layers that include both proteins and chitin.
- **Option D**: Single complex protein called orthopodin - This is incorrect because the exoskeleton is not formed from a single protein.

5. **Conclusion**: Based on the analysis, the correct answer is **Option C: Layers of protein and chitin**.

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