Question

question 7
1 pts
ultraviolet light is essential for the formation of this vitamin.
b6
b12
k
a
d

Explanation:

When the skin is exposed to ultraviolet (UV) light, a form of cholesterol in the skin (7 - dehydrocholesterol) is converted into vitamin D. Vitamin B6 is involved in amino - acid metabolism, B12 is important for nerve function and red - blood - cell formation, vitamin K is involved in blood clotting, and vitamin A is related to vision and immune function. None of these (B6, B12, K, A) have a direct formation process that is dependent on ultraviolet light like vitamin D does.

Answer:

E. D