Multiple choice general knowledge

This element is responsible for straight or curly hair-

  1. Iron

  2. Phosphorus

  3. Potassium

  4. Sulphur
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sulfur is the key element responsible for hair texture. Hair keratin contains cysteine amino acids with sulfur atoms that form disulfide bonds between protein chains. More disulfide bonds create tighter curls (as in curly hair), while fewer bonds result in straighter hair. This is why chemical hair treatments (perms/relaxers) work by breaking and reforming these sulfur bonds.

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