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 27^th 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	Solubility
Vitamin A	Retinoids (retinol, retinoids and carotenoids)	Fat
Vitamin B1	Thiamine	Water
Vitamin B2	Riboflavin	Water
Vitamin B3	Niacin, niacinamide	Water
Vitamin B5	Pantothenic acid	Water
Vitamin B6	Pyridoxine, pyridoxamine, pyridoxal	Water
Vitamin B7	Biotin	Water
Vitamin B9	Folic acid, folinic acid	Water
Vitamin B12	Cyanocobalamin, hydroxycobalamin, methylcobalamin	Water
Vitamin C	Ascorbic acid	Water
Vitamin D	Ergocalciferol, cholecalciferol	Fat
Vitamin E	Tocopherols, tocotrienols	Fat
Vitamin K	phylloquinone,menaquinones	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
Vitamin B4	Adenine	DNA metabolite
Vitamin B8	Adenylic acid	DNA metabolite
Vitamin F	Essential fatty acids	Needed in large quantities (does not fit the definition of a vitamin).
Vitamin G	Riboflavin	Reclassified as Vitamin B2
Vitamin H	Biotin	Reclassified as Vitamin B7
Vitamin J	Catechol, Flavin	Protein metabolite
Vitamin L1[32]	Anthranilic acid	Protein metabolite
Vitamin L2[32]	Adenylthiomethylpentose	RNA metabolite
Vitamin M	Folic acid	Reclassified as Vitamin B9
Vitamin O	Carnitine	Protein metabolite
Vitamin P	Flavonoids	No longer classified as a vitamin
Vitamin PP	Niacin	Reclassified as Vitamin B3
Vitamin U	S-Methylmethionine	Protein metabolite

Tips

The fourth Choice is infact Vitamin F, which is a fatty acid