What is a characteristic feature of the secondary structure of fibrous proteins?

Which of the following scenarios best illustrates the role of fibrous proteins in the human body?

Which structural feature is unique to alpha keratin compared to other fibrous proteins?

Which of the following is a functional role of globular proteins that distinguishes them from fibrous proteins?

What type of bonding is crucial for the stability of silk fibroin's structure?

How does the structure of silk fibroin contribute to its strength and flexibility?