Biology – Vitamins MCQ

Vitamins are organic compounds essential for maintaining good health and wellbeing. They play vital roles in various bodily functions, including metabolism, immunity, and digestion. Let’s explore some fundamental multiple-choice questions to enhance our understanding of vitamins.

1. Which vitamin is known as the "sunshine vitamin"?

a) Vitamin A
b) Vitamin C
c) Vitamin D
d) Vitamin E

Answer:

c) Vitamin D

Explanation:

Vitamin D is often referred to as the "sunshine vitamin" because it is produced in your skin in response to sunlight.

2. Which of the following vitamins is water-soluble?

a) Vitamin A
b) Vitamin C
c) Vitamin D
d) Vitamin E

Answer:

b) Vitamin C

Explanation:

Vitamin C is water-soluble, meaning it dissolves in water and is not stored in the body, requiring regular intake through diet.

3. Vitamin K is essential for:

a) Vision
b) Blood clotting
c) Bone health
d) Skin health

Answer:

b) Blood clotting

Explanation:

Vitamin K plays a crucial role in blood clotting, helping prevent excessive bleeding.

4. Which vitamin is essential for maintaining healthy skin and vision?

a) Vitamin A
b) Vitamin B
c) Vitamin C
d) Vitamin D

Answer:

a) Vitamin A

Explanation:

Vitamin A is vital for maintaining healthy skin, vision, and the immune system.

5. Beriberi is a disease caused by the deficiency of which vitamin?

a) Vitamin A
b) Vitamin B1 (Thiamine)
c) Vitamin C
d) Vitamin D

Answer:

b) Vitamin B1 (Thiamine)

Explanation:

Beriberi is caused by a deficiency of Thiamine (Vitamin B1) and affects the cardiovascular and nervous systems.

6. Which vitamin acts as an antioxidant?

a) Vitamin A
b) Vitamin C
c) Vitamin D
d) Vitamin K

Answer:

b) Vitamin C

Explanation:

Vitamin C has antioxidant properties, protecting cells from damage by neutralizing free radicals.

7. Scurvy is caused by a deficiency of:

a) Vitamin A
b) Vitamin B
c) Vitamin C
d) Vitamin D

Answer:

c) Vitamin C

Explanation:

Scurvy is a disease resulting from a deficiency of Vitamin C, leading to symptoms like gum disease and skin problems.

8. Which vitamin is essential for the absorption of calcium in the body?

a) Vitamin A
b) Vitamin B12
c) Vitamin C
d) Vitamin D

Answer:

d) Vitamin D

Explanation:

Vitamin D enhances the absorption of calcium from the small intestine, which is essential for bone health.

9. Vitamin B12 is important for:

a) Nerve function
b) Skin health
c) Vision
d) Blood clotting

Answer:

a) Nerve function

Explanation:

Vitamin B12 is crucial for nerve function, the formation of red blood cells, and DNA synthesis.

10. Which vitamin aids in the healing of wounds?

a) Vitamin A
b) Vitamin C
c) Vitamin D
d) Vitamin E

Answer:

b) Vitamin C

Explanation:

Vitamin C plays a role in collagen production, which is essential for wound healing.

11. Rickets, a disease characterized by the softening of bones, is caused by a deficiency of which vitamin?

a) Vitamin A
b) Vitamin C
c) Vitamin D
d) Vitamin K

Answer:

c) Vitamin D

Explanation:

Rickets is caused by a deficiency of Vitamin D, leading to the weakening and softening of bones.

12. Night blindness can result from a deficiency of:

a) Vitamin A
b) Vitamin B
c) Vitamin C
d) Vitamin D

Answer:

a) Vitamin A

Explanation:

A deficiency in Vitamin A can lead to night blindness, as this vitamin is essential for vision.

13. Which of the following vitamins is essential for the metabolism of amino acids and fatty acids?

a) Vitamin B2 (Riboflavin)
b) Vitamin B6 (Pyridoxine)
c) Vitamin B12 (Cobalamin)
d) Vitamin C (Ascorbic Acid)

Answer:

b) Vitamin B6 (Pyridoxine)

Explanation:

Vitamin B6 is involved in the metabolism of amino acids, glycogen, and fatty acids.

14. Which vitamin is synthesized by intestinal bacteria in the human body?

a) Vitamin A
b) Vitamin B12
c) Vitamin C
d) Vitamin K

Answer:

d) Vitamin K

Explanation:

Vitamin K can be synthesized by bacteria in the intestines, although dietary intake is also important.

15. Pellagra is a disease caused by the deficiency of which vitamin?

a) Niacin (Vitamin B3)
b) Riboflavin (Vitamin B2)
c) Thiamine (Vitamin B1)
d) Ascorbic Acid (Vitamin C)

Answer:

a) Niacin (Vitamin B3)

Explanation:

Pellagra is characterized by diarrhea, dermatitis, dementia, and can be caused by a deficiency in Niacin (Vitamin B3).


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