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Question

The precursor for vitamin D is :

A
cholesterol
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B
arachidonic acid
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C
triacylglycerol
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D
phospholipids
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Solution

The correct option is A cholesterol
vitamin D is classified as a fat-soluble vitamin, it actually functions as a hormone in the body. The skin contains the vitamin D precursor molecule: 7-dehydrocholesterol. Under exposure to ultraviolet rays the precursor is converted into cholecalciferol. Cholecalciferol is compound with a structure similar to cholesterol.

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