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Biochemistry

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Vitamins, Harmones and Hemoglobin

Question
23 out of 30
 

Which of the following is a water soluble vitamin? (AIPG 2008)



A Vitamin K
B Folic acid

C Vitamin A
D Tocopherol

Ans. B Folic acid

a. “Folic acid is a hematopoietic water soluble vitamin”.

b. Water-soluble vitamins differ from fat-soluble vitamins in several respects. Most are readily excreted once their concentration surpasses the renal threshold. Thus toxicities are rare Deficiencies of these vitamins occur relatively quickly on an inadequate diet.

c. Their metabolic stores are labile and depletion can often occur in a matter of weeks or months. Since the water-soluble vitamins are coenzymes for many common biochemical reactions, it is often possible to assay vitamin status by measuring one or more enzyme activities in isolated red blood cells.

d. These assays are especially useful if one measures the endogenous activity and the stimulated activity following addition of the active coenzyme derived from that vitamin.

Vitamins, Harmones and Hemoglobin Flashcard List

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