Biology 9700 · AS & A Level · Proteins

Proteins — practice question

Collagen is a protein that contributes to strengthening the skin and improving its elasticity and hydration. As aging occurs, the body produces less collagen, which can result in dry skin and the development of wrinkles. Which row gives the correct description of the structure of collagen in the skin?

  • Aevery fourth amino acid is glycine: ✗; fibrous protein: ✗
  • Bevery fourth amino acid is glycine: ✓; fibrous protein: ✓
  • Cevery fourth amino acid is glycine: ✗; fibrous protein: ✓
  • Devery fourth amino acid is glycine: ✓; fibrous protein: ✗

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