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MDCAT Biology QUESTION #4176
Question 1
A mutation prevents proper disulphide bond formation in a fibrous protein, causing brittle nails and slow hair growth. Which of the following proteinaceous substance would be affected?
  • Elastin
  • Actin
  • Keratin✔️
  • Collagen
Correct Answer Explanation
Keratin contains disulphide bonds that give strength to hair and nails.