Multiple choice

Which of the following sterols is a precursor to vitamin D2?

  1. Stigmasterol

  2. Ergosterol

  3. Campesterol

  4. Brassicasterol
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ergosterol is a biological precursor (a provitamin) to vitamin D2. It is turned into viosterol by ultraviolet light and is then converted into ergocalciferol which is a form of vitamin D. It does not occur in plants or animal cells, but it is a component of yeast and fungal cell membranes serving the same function that cholesterol serves in animal cells.

Keep practicing — related questions