Multiple choice

Which of the following statements is correct about Vitamin-D3 or Cholecalciferol?

  1. It is produced non-enzymetically in skin from 7-dehydrocholesterol.

  2. It is an antioxidant.

  3. It is composed of imidazole and thiophene ring fused together.

  4. It contains pterin ring connected with p-aminobenzoic acid.

  5. It is a corrinoid bearing the corrin ring.
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A Correct answer
Explanation

Vitamin-D3 or Cholecalciferol is synthesized in skin. At first previtamin-D is produced non-enzymetically in skin from 7-dehydrocholesterol with the help of UV rays of sunlight. Then it undergoes several reactions for some time to form cholecalciferol.

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