1
MCQ ON VITAMINS
1. Vitamin A or retinal is a
(A) Steroid
(B) Polyisoprenoid compound containing a cyclohexenyl ring
(C) Benzoquinone derivative
(D) 6-Hydroxychromane
2.
β
-Carotene, precursor of vitamin A, is oxidatively cleaved by
(A)
β
-Carotene dioxygenase (B) Oxygenase
\
(C) Hydroxylase
(D) Transferase
3. Deficiency of Vitamin A causes
(A) Xeropthalmia
(B) Hypoprothrombinemia
(C) Megaloblastic anemia
(D) Pernicious anemia
3. Carr-Price reaction is used to detect
(A) Vitamin A
(B) Vitamin D
(C) Ascorbic acid
(D) Vitamin E
4. The most potent Vitamin D metabolite is
(A) 25-Hydroxycholecalciferol
(B) 1,25-Dihydroxycholecalciferol
(C) 24, 25-Dihydroxycholecalciferol
(D) 7-Dehydrocholesterol
5. Creatinuria is caused due to the deficiency of vitamin
(A) A
(B) K
(C) E
(D) D
6. Vitamin K is involved in posttranslational modification of the blood clotting
factors by acting as cofactor for the enzyme: