MCQ ON VITAMINS (BIOCHEMISTRY).PDF......

VITAMINS

1. MCQ ON VITAMINS (BIOCHEMISTRY)
1. Which vitamin is essential for collagen formation in connective tissues?
A) Vitamin A
B) Vitamin C
C) Vitamin D
D) Vitamin E
Answer: B) Vitamin C
2. Which vitamin deficiency causes rickets in children?
A) Vitamin B1
B) Vitamin C
C) Vitamin D
D) Vitamin A
Answer: C) Vitamin D
3. Which vitamin is known as the “antioxidant vitamin”?
A) Vitamin K
B) Vitamin E
C) Vitamin B12
D) Vitamin A
Answer: B) Vitamin E
4. Which of the following vitamins is involved in the metabolism of proteins and amino
acids?
A) Vitamin B6
B) Vitamin B2
C) Vitamin B1
D) Vitamin B3
Answer: A) Vitamin B6
5. Which vitamin is synthesized in the skin upon exposure to sunlight?
A) Vitamin A
B) Vitamin C
C) Vitamin D
D) Vitamin K
Answer: C) Vitamin D
6. Which vitamin is required for the synthesis of coenzyme A (CoA)?
A) Vitamin B1
B) Vitamin B5
C) Vitamin B7
D) Vitamin B12
Answer: B) Vitamin B5

2. 7. Deficiency of which vitamin causes night blindness?
A) Vitamin A
B) Vitamin D
C) Vitamin E
D) Vitamin K
Answer: A) Vitamin A
8. Which of the following vitamins plays a crucial role in the formation of red blood
cells?
A) Vitamin K
B) Vitamin B12
C) Vitamin D
D) Vitamin C
Answer: B) Vitamin B12
9. Which vitamin is essential for blood clotting?
A) Vitamin B6
B) Vitamin K
C) Vitamin D
D) Vitamin A
Answer: B) Vitamin K
10. Which vitamin is involved in the conversion of tryptophan to niacin (vitamin B3)?
A) Vitamin B6
B) Vitamin B12
C) Vitamin B2
D) Vitamin C
Answer: A) Vitamin B6
11. Which vitamin deficiency leads to pellagra?
A) Vitamin B3
B) Vitamin B2
C) Vitamin B12
D) Vitamin C
Answer: A) Vitamin B3
12. What is the function of Vitamin B7 (biotin)?
A) It helps in the formation of red blood cells
B) It aids in the metabolism of carbohydrates, fats, and proteins
C) It maintains bone health
D) It helps in the absorption of calcium
Answer: B) It aids in the metabolism of carbohydrates, fats, and proteins

3. 13. Which vitamin is also known as cobalamin?
A) Vitamin B12
B) Vitamin B1
C) Vitamin A
D) Vitamin D
Answer: A) Vitamin B12
14. Which vitamin is primarily responsible for calcium absorption in the intestine?
A) Vitamin D
B) Vitamin K
C) Vitamin A
D) Vitamin E
Answer: A) Vitamin D
15. What is the deficiency of Vitamin B1 (thiamine) associated with?
A) Beriberi
B) Scurvy
C) Rickets
D) Pellagra
Answer: A) Beriberi
16. Which vitamin is involved in the synthesis of hemoglobin?
A) Vitamin C
B) Vitamin B6
C) Vitamin K
D) Vitamin A
Answer: B) Vitamin B6
17. Which vitamin is needed for the synthesis of serotonin and melatonin?
A) Vitamin B6
B) Vitamin B12
C) Vitamin A
D) Vitamin D
Answer: A) Vitamin B6
18. The vitamin that is a precursor for the synthesis of retinol (vitamin A) is:
A) Beta-carotene
B) Ergocalciferol
C) Ascorbic acid
D) Phylloquinone
Answer: A) Beta-carotene
19. Vitamin D is primarily obtained from:
A) Sunlight
B) Dairy products

4. C) Leafy greens
D) Fish oils
Answer: A) Sunlight
20. The active form of Vitamin A is:
A) Retinal
B) Retinol
C) Retinoic acid
D) Beta-carotene
Answer: C) Retinoic acid
21. What is the function of Vitamin C in the body?
A) Antioxidant
B) Blood clotting
C) Calcium absorption
D) Hemoglobin synthesis
Answer: A) Antioxidant
22. Vitamin B2 is also known as:
A) Riboflavin
B) Pyridoxine
C) Thiamine
D) Niacin
Answer: A) Riboflavin
23. Vitamin B12 deficiency can lead to:
A) Scurvy
B) Pernicious anemia
C) Rickets
D) Pellagra
Answer: B) Pernicious anemia
24. Which vitamin is involved in the synthesis of clotting factors?
A) Vitamin D
B) Vitamin E
C) Vitamin K
D) Vitamin A
Answer: C) Vitamin K
25. Which vitamin helps in the repair of tissues and bones?
A) Vitamin A
B) Vitamin C
C) Vitamin D
D) Vitamin E
Answer: B) Vitamin C

5. 26. What is the primary source of Vitamin E in the diet?
A) Sunflower oil
B) Fish oils
C) Carrots
D) Dairy products
Answer: A) Sunflower oil
27. Which vitamin helps to maintain skin health?
A) Vitamin C
B) Vitamin A
C) Vitamin B7
D) Vitamin E
Answer: B) Vitamin A
28. Deficiency of Vitamin B9 (folic acid) in pregnancy can lead to:
A) Rickets
B) Neural tube defects
C) Pellagra
D) Anemia
Answer: B) Neural tube defects
29. Which vitamin is required for the synthesis of neurotransmitters like dopamine and
serotonin?
A) Vitamin B6
B) Vitamin B1
C) Vitamin B12
D) Vitamin B9
Answer: A) Vitamin B6
30. The deficiency of Vitamin D can lead to:
A) Scurvy
B) Rickets
C) Night blindness
D) Pellagra
Answer: B) Rickets
31. The major function of Vitamin A in vision is:
A) Conversion of light into nerve signals
B) Formation of the visual pigments
C) Protection from UV rays
D) Synthesis of retinal
Answer: B) Formation of the visual pigments

6. 32. Which vitamin is essential for the proper function of the immune system?
A) Vitamin A
B) Vitamin D
C) Vitamin E
D) Vitamin K
Answer: B) Vitamin D
33. Which vitamin helps prevent neural tube defects in early pregnancy?
A) Vitamin C
B) Vitamin B12
C) Vitamin B9 (folate)
D) Vitamin E
Answer: C) Vitamin B9 (folate)
34. The deficiency of which vitamin can cause scurvy?
A) Vitamin A
B) Vitamin C
C) Vitamin D
D) Vitamin B12
Answer: B) Vitamin C
35. Which of the following vitamins is water-soluble?
A) Vitamin A
B) Vitamin D
C) Vitamin C
D) Vitamin E
Answer: C) Vitamin C
36. What is the function of Vitamin B2 (riboflavin)?
A) Antioxidant activity
B) Collagen synthesis
C) Coenzyme in redox reactions
D) Blood clotting
Answer: C) Coenzyme in redox reactions
37. Which vitamin is required for the conversion of pyruvate to acetyl-CoA?
A) Vitamin B5
B) Vitamin B1
C) Vitamin B3
D) Vitamin B6
Answer: A) Vitamin B5

7. 38. Which vitamin deficiency is associated with a condition called “cheilosis” (cracked
lips)?
A) Vitamin B1
B) Vitamin B2
C) Vitamin B3
D) Vitamin B6
Answer: B) Vitamin B2
39. What is the role of Vitamin B3 (niacin) in the body?
A) Antioxidant function
B) Involved in energy metabolism
C) Blood clotting
D) Bone health
Answer: B) Involved in energy metabolism
40. Which vitamin helps to prevent the oxidation of LDL cholesterol?
A) Vitamin C
B) Vitamin E
C) Vitamin A
D) Vitamin D
Answer: B) Vitamin E
41. What is the active form of Vitamin B6?
A) Pyridoxal phosphate
B) Pyridoxamine
C) Pyridoxine
D) Thiamine pyrophosphate
Answer: A) Pyridoxal phosphate
42. Which vitamin is synthesized in the intestines with the help of bacteria?
A) Vitamin K
B) Vitamin D
C) Vitamin E
D) Vitamin B12
Answer: A) Vitamin K
43. Which vitamin helps in the absorption of iron?
A) Vitamin C
B) Vitamin B6
C) Vitamin A
D) Vitamin D
Answer: A) Vitamin C

8. 44. Which vitamin is essential for the synthesis of coenzyme Q10 (ubiquinone)?
A) Vitamin B12
B) Vitamin B6
C) Vitamin E
D) Vitamin C
Answer: A) Vitamin B12
45. Which vitamin is known to reduce the risk of birth defects when taken before and
during pregnancy?
A) Vitamin B12
B) Vitamin C
C) Vitamin B9 (folate)
D) Vitamin D
Answer: C) Vitamin B9 (folate)
46. Vitamin D toxicity can result in:
A) Osteoporosis
B) Hypercalcemia
C) Rickets
D) Scurvy
Answer: B) Hypercalcemia
47. Which of the following vitamins is important for the synthesis of collagen?
A) Vitamin A
B) Vitamin D
C) Vitamin C
D) Vitamin K
Answer: C) Vitamin C
48. Which of the following vitamins is found mainly in animal products and is not easily
found in plant foods?
A) Vitamin B12
B) Vitamin B7
C) Vitamin D
D) Vitamin E
Answer: A) Vitamin B12
49. Which vitamin is a cofactor for the enzyme responsible for the synthesis of serotonin
from tryptophan?
A) Vitamin B6
B) Vitamin B3
C) Vitamin B9
D) Vitamin B12
Answer: A) Vitamin B6

9. 50. Which vitamin deficiency is most commonly seen in people with chronic alcohol use?
A) Vitamin B1 (thiamine)
B) Vitamin C
C) Vitamin A
D) Vitamin D
Answer: A) Vitamin B1 (thiamine)