In this collection there will be a bunch of questions on vitamins
This collection is useful for all medical, chemistry and pharmacy students
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:
2
(A) Carboxylase
(B) Decarboxylase
(C) Hydroxylase
(D) Oxidase
7. Concentration of pyruvic acid and lactic acid in blood is increased due to deficiency
of the vitamin
(A) Thiamin (B) Riboflavin
(C) Niacin
(D) Pantothenic acid
8. Vitamin B1 coenzyme (TPP) is involved in
(A) Oxidative decarboxylation
(B) Hydroxylation
(C) Transamination
(D) Carboxylation
9. Magenta tongue is found in the deficiency of the vitamin
(A) Riboflavin
(B) Thiamin (C) Nicotinic acid
(D) Pyridoxine
10. The pellagra preventive factor is
(A) Riboflavin
(B) Pantothenic acid (C) Niacin
(D) Pyridoxine
11. Niacin or nicotinic acid is a monocarboxylic acid derivative of
(A) Pyridine
(B) Pyrimidine
(C) Flavin
(D) Adenine
12. Niacin is synthesized in the body from
(A) Tryptophan
(B) Tyrosine (C) Glutamate
(D) Aspartate
13. Pellagra occurs in population dependent on
(A) Wheat
(B) Rice
(C) Maize
(D) Milk
14. Pantothenic acid is a constituent of the coenzyme involved in
(A) Decarboxylation
(B) Dehydrogenation
(C) Acetylation
(D) Oxidation
3
15. The precursor of CoA is
(A) Riboflavin
(B) Pyridoxamine
(C) Thiamin (D) Pantothenate
16. ‘Burning foot syndrome’ has been ascribed to the deficiency of
(A) Pantothenic acid (B) Thiamin (C) Cobalamin
(D) Pyridoxine
17. ‘Xanthurenic acid index’ is a reliable criterion for the deficiency of the vitamin
(A) Pyridoxal (B) Thiamin (C) Pantothenic acid (D) Cobalamin
18. Biotin is a coenzyme of the enzyme
(A) Carboxylase
(B) Hydroxylase
(C) Decarboxylase
(D) Deaminase
19. Folate deficiency causes
(A) Microcytic anemia
(B) Hemolytic anemia
(C) Iron deficiency anemia
(D) Megaloblastic anemia
20. Niacin can be synthesised in human beings from
(A) Histidine (B) Phenylalanine
(C) Tyrosine (D) Tryptophan
21. Pantothenic acid contains an amino acid which is
(A) Aspartic acid
(B) Glutamic acid
(C)
β
-Alanine
(D)
β
-Aminoisobutyric acid
22. Coenzyme A contains a nitrogenous base which is
(A) Adenine (B) Guanine (C) Choline (D) Ethanolamine
23 . Pyridoxal phosphate is a coenzyme for
4
(A) Glycogen synthetase
(B) Phosphorylase
(C) Both (A) and (B)
(D) None of these
24. Pyridoxine deficiency can be diagnosed by measuring urinary excretion of
(A) Pyruvic acid
(B) Oxaloacetic acid (C) Xanthurenic acid (D) None of these
25. When eggs are cooked
(A) Biotin is destroyed but avidin remains unaffected
(B) Avidin is inactivated but biotin remains unaffected
(C) Both avidin and biotin are inactivated
(D) Both avidin and biotin remain unaffected
26. Chemically, lipoic acid is
(A) Saturated fatty acid
(B) Unsaturated fatty acid
(C) Amino acid
(D) Sulphur containing fatty acid
27. Deficiency of vitamin B12 can be diagonised by
(A) Carr-Price reaction
(B) Ames assay
(C) Watson-Schwartz test
(D) Schilling test
28. Anti-oxidant activity is present in
(A)
β
-Carotene
(B) Retinol
(C) Retinoic acid
(D) All of these
29. Nyctalopia is
(A) Drying of eyes
(B) Destruction of cornea
(C) Blindness
(D) Inability to see in dimlight
30. Ascorbic acid can reduce
5
(A) 2, 4-dinitro benzene
(B) 2, 6-Dichlorophenol Indophenol
(C) 2, 4-dibromobenzene
(D) 2, 6-dibromo benzene
31. Sterilized milk is devoid of
(A) Vitamin A (B) Vitamin B1
(C) Vitamin C (D) Vitamin D
32. Antirachitic vitamin is
(A) Vitamin A
(B) Vitamin D
(C) Vitamin E
(D) Vitamin K
33. Convulsive episodes occur when there is a severe deficiency of:
(A) Pyridoxine
(B) Folic acid
(C) Thiamine
(D) Riboflavin
34. Which ot the following vitamin is involved in coenzyme function in
tansaminations?
(A) Nicotinamide
(B) Pyridoxine
(C) Thiamine
(D) Riboflavin
35. During deficiency of thiamine the concentration of the following compound
rises in blood and intracellular fluid:
(A) Glycogen (B) Sugar
(C) Amino acids
(D) Pyruvic acid
36. Transketolase activity is affected in
(A) Bitoin deficiency
(B) Pyridoxine deficiency
(C) PABA deficiency
(D) Thiamine deficiency