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Vitamins, Their Functions and Sources Solved MCQs

Vitamins, their Key Role, Source, & Importance in Biology 

Vitamins


1. What is the primary function of Vitamin C?

a) Bone health  

b) Blood clotting  

c) Collagen synthesis  

d) Vision


2. Which vitamin is essential for proper blood clotting?

a) Vitamin A  

b) Vitamin K  

c) Vitamin D  

d) Vitamin E


3. What is the main source of Vitamin D?

a) Citrus fruits  

b) Sunlight  

c) Fish oil  

d) Dairy products


4. Which vitamin is crucial for maintaining healthy vision?

a) Vitamin C  

b) Vitamin A  

c) Vitamin E  

d) Vitamin K


5. Which vitamin is water-soluble and needs to be replenished regularly in the diet?

a) Vitamin A  

b) Vitamin D  

c) Vitamin B12  

d) Vitamin K


6. What is the function of Vitamin E in the body?

a) Wound healing  

b) Antioxidant protection  

c) Calcium absorption  

d) Red blood cell production


7. Which vitamin is crucial for the formation of red blood cells?

a) Vitamin B12  

b) Vitamin C  

c) Vitamin D  

d) Vitamin K


8. What is the role of Vitamin K in the body?

a) Antioxidant  

b) Blood clotting  

c) Collagen synthesis  

d) Bone health


9. Which vitamin deficiency can lead to scurvy?

a) Vitamin A  

b) Vitamin C  

c) Vitamin E  

d) Vitamin D


10. What is the primary source of Vitamin B6?

a) Leafy greens  

b) Citrus fruits  

c) Meat and poultry  

d) Nuts and seeds


11. What is the primary function of Vitamin A in the body?

   a) Bone health

   b) Vision and immune system support

   c) Blood clotting

   d) Muscle contraction


12. Which of the following foods is a good source of preformed Vitamin A (retinol)?

   a) Oranges

   b) Carrots

   c) Spinach

   d) Liver


13. What is the term for the condition caused by a deficiency of Vitamin A, leading to night blindness?

   a) Scurvy

   b) Rickets

   c) Beriberi

   d) Xerophthalmia


 14. Which of the following statements about Vitamin A is true?

   a) It is water-soluble

   b) Excess intake is stored in the body

   c) Found only in animal products

   d) Enhances calcium absorption


15. What is the recommended daily allowance (RDA) for Vitamin A for an adult male?

   a) 500 IU

   b) 1000 IU

   c) 2000 IU

   d) 5000 IU


16. Which vitamin B is essential for the metabolism of carbohydrates, fats, and proteins?

   a) Vitamin B1 (Thiamine)  

   b) Vitamin B2 (Riboflavin)  

   c) Vitamin B6 (Pyridoxine)  

   d) Vitamin B12 (Cobalamin)


17. Which vitamin B is crucial for maintaining healthy skin, eyes, and nerve function?

   a) Vitamin B3 (Niacin)  

   b) Vitamin B5 (Pantothenic Acid)  

   c) Vitamin B7 (Biotin)  

   d) Vitamin B2 (Riboflavin)


18. Deficiency of which vitamin B can lead to pernicious anemia?

   a) Vitamin B6 (Pyridoxine)  

   b) Vitamin B9 (Folate)  

   c) Vitamin B12 (Cobalamin)  

   d) Vitamin B3 (Niacin)


19. Which vitamin B is involved in the synthesis of DNA and red blood cells?

   a) Vitamin B5 (Pantothenic Acid)  

   b) Vitamin B9 (Folate)  

   c) Vitamin B7 (Biotin)  

   d) Vitamin B6 (Pyridoxine)


20. Pellagra, a disease characterized by dermatitis, diarrhea, and dementia, is caused by a deficiency of which vitamin B?

   a) Vitamin B2 (Riboflavin)  

   b) Vitamin B3 (Niacin)  

   c) Vitamin B5 (Pantothenic Acid)  

   d) Vitamin B6 (Pyridoxine)


21. What is the primary function of Vitamin B1 (Thiamine)?

a. Bone health  

b. Vision  

c. Energy metabolism  

d. Blood clotting  


22. Which vitamin is also known as Riboflavin?

a. B1  

b. B2  

c. B3  

d. B6  


23. Niacin is another name for which vitamin?

a. B1  

b. B2  

c. B3  

d. B6  


24. Vitamin B6 is essential for:

a. Red blood cell formation  

b. Healthy skin  

c. Calcium absorption  

d. Protein metabolism  


25. Folate is the natural form of which B-vitamin?

a. B1  

b. B6  

c. B9  

d. B12  


26. Cyanocobalamin is the synthetic form of which vitamin?

a. B1  

b. B2  

c. B9  

d. B12  


27. What is the scientific name for Vitamin C?

   a) Ascorbic Acid

   b) Citric Acid

   c) Folic Acid

   d) Riboflavin


28. Which of the following is a primary function of Vitamin C in the body?

   a) Blood clotting

   b) Collagen synthesis

   c) Bone formation

   d) Nerve transmission


29. What is the main dietary source of Vitamin C?

   a) Meat

   b) Citrus fruits

   c) Dairy products

   d) Grains


30. What condition is caused by a deficiency of Vitamin C?

   a) Rickets

   b) Scurvy

   c) Beriberi

   d) Pellagra


31. Which of the following is true about Vitamin C?

   a) It is stored in large amounts in the body

   b) It is water-soluble

   c) It is primarily found in animal products

   d) It is resistant to heat


32. Which form of Vitamin D is synthesized in the skin upon exposure to sunlight?

   a) Vitamin D1

   b) Vitamin D2

   c) Vitamin D3

   d) Vitamin D4


33. What is the main function of Vitamin D in the body?

   a) Blood clotting

   b) Bone health

   c) Vision

   d) Immune system support


34. In which food group is Vitamin D commonly found?

   a) Grains

   b) Fruits

   c) Proteins

   d) Fats


35. What is the condition caused by a deficiency of Vitamin D?

   a) Rickets

   b) Scurvy

   c) Pellagra

   d) Beriberi


36. Which of the following helps in the absorption of Vitamin D in the intestines?

   a) Calcium

   b) Iron

   c) Magnesium

   d) Phosphorus


37. What is the recommended daily intake of Vitamin D for adults?

   a) 200 IU (International Units)

   b) 400 IU (International Units)

   c) 600 IU (International Units)

   d) 800 IU (International Units)


38. Which population group is at a higher risk of Vitamin D deficiency?

   a) Children

   b) Adults

   c) Elderly

   d) Adolescents


39. What is the medical term for an excessive intake of Vitamin D?

   a) Hypervitaminosis D

   b) Hypovitaminosis D

   c) Hypercalcemia

   d) Hypocalcemia


40. Which organ converts inactive Vitamin D into its active form?

   a) Liver

   b) Kidneys

   c) Pancreas

   d) Spleen


41. What is the primary function of Vitamin E in the body?

   a. Bone health  

   b. Vision improvement  

   c. Antioxidant protection  

   d. Blood clotting  


42. Which food source is rich in Vitamin E?

   a. Oranges  

   b. Spinach  

   c. Nuts and seeds  

   d. Red meat  


43. What deficiency can result from inadequate Vitamin E intake?

   a. Rickets  

   b. Scurvy  

   c. Night blindness  

   d. Hemolytic anemia  


44. What is the recommended daily allowance (RDA) for Vitamin E in adults?

   a. 50 IU (International Units)  

   b. 200 IU (International Units)  

   c. 400 IU (International Units)  

   d. 800 IU (International Units)  


45. Which form of Vitamin E is known for its maximum biological activity?

   a. Alpha-tocopherol  

   b. Beta-tocopherol  

   c. Gamma-tocopherol  

   d. Delta-tocopherol  


46. Which of the following is a function of vitamin E in the body?

a) Blood clotting  

b) Vision  

c) Antioxidant protection  

d) Bone development  


47. What is the main role of vitamin E in the body?

a) Enhancing calcium absorption  

b) Regulating blood sugar levels  

c) Protecting cell membranes from oxidative damage  

d) Assisting in blood clotting  


48. Which food sources are rich in vitamin E?

a) Citrus fruits  

b) Leafy greens  

c) Nuts and seeds  

d) Dairy products  


49. What deficiency disease is associated with inadequate intake of vitamin E?

a) Beriberi  

b) Pellagra  

c) Rickets  

d) Hemolytic anemia  


50. Which population group might be at a higher risk of vitamin E deficiency?

a) Young adults  

b) Elderly individuals  

c) Athletes  

d) Vegetarians  


51. What is the primary function of vitamin K in the body?

   a. Bone health

   b. Blood clotting

   c. Vision

   d. Immune system support


52. Which of the following vitamins is essential for the synthesis of blood-clotting proteins?

   a. Vitamin A

   b. Vitamin C

   c. Vitamin D

   d. Vitamin K


53. In which food group is vitamin K commonly found?

   a. Fruits

   b. Vegetables

   c. Dairy products  

   d. Meat and poultry


54. What is the condition caused by a deficiency of vitamin K, characterized by impaired blood clotting?

   a. Scurvy

   b. Rickets 

   c. Beriberi

   d. Hemorrhage


55. Which of the following statements about vitamin K is true?

a. It is a water-soluble vitamin

b. It is stored in the body for long periods

c. It is produced in sufficient amounts by the human body

d. Newborns are often given a vitamin K shot to prevent bleeding disorders


Also Read the Following Suggested Topics for Further Reading

Biology & its Branches Solved MCQs

Laws of Inheritance in Biology Solved MCQs

Nutrition in Plants Solved MCQs

Bioenergetics in Plants Solved MCQs

Respiration in Plants and AnimalsSolved MCQs

Reproduction in Plants and Animals Solved MCQs

Animal and Plant Cell Solved MCQs

Biology in General Solved MCQs

Biotechnology and Genetics Solved MCQs

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Location: Sukkur, Sindh, Pakistan

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