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Monday, December 15, 2008

Folic Acid Water Soluble Vitamin

Question 23
Which of the following is a Water Soluble Vitamin
a.       Folic Acid
b.      Vitamin A
c.       Vitamin B
d.      Linolenic Acid

Answer

a)      Folic Acid

Reference

Harper 27th Edition Page : 490, 496

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Discussion

A vitamin is a nutrient that is an organic compound required in tiny amounts for essential metabolic reactions in a living organism.[1] Most vitamins cannot be obtained in sufficient quantities by synthesis in the body, and therefore must be obtained from the diet..

Explanation

Vitamin generic descriptor name
Chemical name
Fat
Water
Water
Vitamin B3
Water
Vitamin B5
Water
Vitamin B6
Water
Vitamin B7
Water
Vitamin B9
Water
Vitamin B12
Water
Water
Fat
Fat
Fat

Comments : Names in current and previous nomenclatures

The reason the set of vitamins seems to skip directly from E to K is that the vitamins corresponding to "letters" F-J were either reclassified over time, discarded as false leads, or renamed because of their relationship to "vitamin B", which became a "complex" of vitamins. The German-speaking scientists who isolated and described vitamin K (in addition to naming it as such) did so because the vitamin is intimately involved in the Koagulation of blood following wounding. At the time, most (but not all) of the letters from F through J were already designated, so the use of the letter K was considered quite reasonable.
The following table lists chemicals that had previously been classified as vitamins, as well as the earlier names of vitamins that later became part of the B-complex:
Previous name
Chemical name
Reason for name change
DNA metabolite
DNA metabolite
Needed in large quantities (does
not fit the definition of a vitamin).
Reclassified as Vitamin B2
Reclassified as Vitamin B7
Protein metabolite
Vitamin L1[32]
Protein metabolite
Vitamin L2[32]
RNA metabolite
Reclassified as Vitamin B9
Vitamin O
Protein metabolite
No longer classified as a vitamin
Reclassified as Vitamin B3
Protein metabolite
Tips
The fourth Choice is infact Vitamin F, which is a fatty acid

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