Podcast
Play an AI-generated podcast conversation about this lesson
Questions and Answers
Which of the following is a characteristic of tough fibers found in hair, nails, and the outer epidermal layer of mammals?
Which of the following is a characteristic of tough fibers found in hair, nails, and the outer epidermal layer of mammals?
- Their structural unit is a beta-sheet polypeptide
- They lack cysteine residues
- They are highly soluble in water
- They contain alpha-helix-breaking amino acids (correct)
Which of the following amino acids is abundant in the α-helical polypeptide of tough fibers?
Which of the following amino acids is abundant in the α-helical polypeptide of tough fibers?
- Alanine (correct)
- Proline
- Cysteine
- Glycine
Why are tough fibers resistant to stretching under normal conditions?
Why are tough fibers resistant to stretching under normal conditions?
- They lack cysteine residues
- They contain beta-sheet structures
- They have high solubility in water
- They form inter-helix disulfide bridges (correct)
Flashcards are hidden until you start studying
