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Keratin is a type of...

Keratin is a type of

A

Protein

B

Cytoskeleton

C

Lipid

D

All of these

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Keratin**: Keratin is a type of protein that is essential for the structure and protection of various parts of the body. 2. **Identifying the Role of Keratin**: It is primarily found in hair, nails, skin, feathers, and horns. This indicates that keratin plays a structural role in these tissues. 3. **Classification of Keratin**: Keratin is classified as a fibrous protein, which means it has a long, fibrous structure that provides strength and resilience. 4. **Solubility of Keratin**: Unlike some proteins that are soluble in water, keratin is insoluble in water and organic solvents, which contributes to its durability and protective functions. 5. **Conclusion**: Therefore, keratin is a type of structural protein that is crucial for the integrity of various biological structures in vertebrates. **Final Answer**: Keratin is a type of protein. ---
**Step-by-Step Solution:** 1. **Understanding Keratin**: Keratin is a type of protein that is essential for the structure and protection of various parts of the body. 2. **Identifying the Role of Keratin**: It is primarily found in hair, nails, skin, feathers, and horns. This indicates that keratin plays a structural role in these tissues. 3. **Classification of Keratin**: Keratin is classified as a fibrous protein, which means it has a long, fibrous structure that provides strength and resilience. ...
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