1. Tardigrade
  2. Question
  3. Biology
  4. Vitamin-D is synthesized in skin by the action of sunlight on :

Q. Vitamin-D is synthesized in skin by the action of sunlight on :

 2212  216 BHUBHU 2006 Report Error

Solution:

Vitamin-D is a steroid which is synthesized from cholesterol. Vitamin-D2 is formed from plant sterol, ergosterol which occurs in yeast and other fungi in the presence of ultraviolet light. Vitamin-D3 formed from animal sterol, 7-dehydroxy cholesterol, which occurs in animal skin. Its synthesis also needs ultraviolet light.