which of the is produced by the skin when a cholesterolbased

which of the is produced by the skin when a cholesterol-based precursor is modified by the presence of ultra radiation?

a. VIt. D

b. Renin

c. Sweat

d. Keratin

Solution

The answer is: a. Vitamin D.

Vitamin B synthesis is dependent on ultraviolet B rays from sunlight, and the precursor is cholesterol based.