Medical Biochemistry MCQ Questions (Vitamins)

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1. On exposure to light rhodopsin forms
(A) All trans-retinal
(B) Cis-retinal
(C) Retinol
(D) Retinoic acid
ans a

2. Vitamin K is found in
(A) Green leafy plants
(B) Meat
(C) Fish
(D) Milk
ans a

3. Which of the following is a function of Vitamin A?
(A) Healing epithelial tissues
(B) Protein synthesis regulation
(C) Cell growth
(D) All of these
ans d

4. The requirement of vitamin E is increased with greater intake of
(A) Carbohydrates
(B) Proteins
(C) Polyunsaturated fat
(D) Saturated fat
ans c

5. Vitamin E reduces the requirement of
(A) Iron
(B) Zinc
(C) Selenium
(D) Magnesium
ans c

6. The most important natural antioxidant is
(A) Vitamin D
(B) Vitamin E
(C) Vitamin B12
(D) Vitamin K
ans b

7. Scurvy is caused due to the deficiency of
(A) Vitamin A
(B) Vitamin D
(C) Vitamin K
(D) Vitamin C
ans d

8. Riboflavin deficiency causes
(A) Cheilosis
(B) Loss of weight
(C) Mental deterioration
(D) Dermatitis
ans a

9. Magenta tongue is found in the deficiency of the vitamin
(A) Riboflavin
(B) Thiamine
(C) Nicotinic acid
(D) Pyridoxine
ans a

10. A deficiency of vitamin B12 causes
(A) Beri-Beri
(B) Scurvy
(C) Pernicious anemia
(D) Ricket
ans c

11. Consumption of raw eggs can cause deficiency of
(A) Biotin
(B) Pantothenic acid
(C) Riboflavin
(D) Thiamin
ans a

12. Folic acid or folate consists of the
(A) Base pteridine, p-amino benzoic acid and asparate
(B) Base purine, p-amino benzoic acid and glutamate
(C) Base pteridine, p-amino benzoic acid and glutamate
(D) Base purine, p-hydroxy benzoic acid and glutamate
ans c

13. Folate deficiency causes
(A) Microcytic anemia
(B) Hemolytic anemia
(C) Iron deficiency anemia
(D) Megaloblastic anemia
ans d

14. Absorption of Vitamin B12 requires the presence of
(A) Pepsin
(B) Hydrochloric acid
(C) Intrinsic factor
(D) Boh (B) and (C)
ans d

15. Intrinsic factor is chemically a
(A) Protein
(B) Glycoprotein
(C) Mucopolysaccaride
(D) Peptide
ans b

16. Vitamin B12 is
(A) Not stored in the body
(B) Stored in bone marrow
(C) Stored in liver
(D) Stored in RE cells
ans c

17. Deficiency of vitamin B12 can occur because of
(A) Decreased intake of vitamin B12
(B) Atrophy of gastric mucosa
(C) Intestinal malabsorption
(D) All of these
ans d

18. Vitamin C is required for the synthesis of
(A) Bile acids from cholesterol
(B) Bile salts from bile acids
(C) Vitamin D from cholesterol
(D) All of these
ans a

19. Vitamin A is stored in the body in
(A) Liver
(B) Adipose tissue
(C) Reticulo-endothelial cells
(D) All of these
ans a

20. When light falls on rod cells
(A) All-cis-retinal is converted into all-trans-retinal
(B) 11-cis-retinal is converted into 11-trans-retinal
(C) 11-trans-retinal is converted into all-transretinal
(D) 11-cis-retinal is converted into all-trans-retinal
ans d

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