Multiple choice

Which of the following functions in the serum as a cholesterol precursor?

  1. Cholecalciferol

  2. 7-Dehydrocholesterol

  3. 7-Dehydrositosterol

  4. Dihydrotachysterol

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

7-Dehydrocholesterol is a zoosterol that functions in the serum as a cholesterol precursor, and is converted to vitamin D3 in the skin.The presence of this compound in human skin enables humans to manufacture vitamin D3 from ultra-violet rays in the sun light, via an intermediate isomer pre-vitamin D3. It is also found in the milk of several mammalian species.

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