Q1. What is the primary function of Vitamin A in the human body?
a) Bone growth
b) Blood clotting
c) Vision
d) Muscle building
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Correct Answer: c) Vision
Explanation: Vitamin A is crucial for maintaining healthy vision. It is a component of the protein rhodopsin, which allows the eye to see in low light conditions.
Q2. Vitamin A deficiency can lead to a condition known as:
a) Scurvy
b) Rickets
c) Night blindness
d) Beriberi
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Correct Answer: c) Night blindness
Q3. Beta-carotene, a precursor of Vitamin A, is primarily found in:
a) Meat products
b) Dairy products
c) Fruits and vegetables
d) Grains
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Correct Answer: c) Fruits and vegetables
Explanation: Beta-carotene, a carotenoid that can be converted into Vitamin A, is found abundantly in fruits and vegetables, especially those that are orange or dark green in colour.
Q4. What role does Vitamin A play in the immune system?
a) It produces antibodies
b) It strengthens mucous barriers
c) It decreases inflammation
d) It produces digestive enzymes
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Correct Answer: b) It strengthens mucous barriers
Explanation: Vitamin A plays a crucial role in maintaining the body’s natural defences. This includes the mucous barriers in the eyes, lungs, gut, and genitals which help trap bacteria and other infectious agents.
Q5. Which vitamin is important for red blood cell production and DNA synthesis?
a) Vitamin B2
b) Vitamin B6
c) Vitamin B9
d) Vitamin B12
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Correct Answer: d) Vitamin B12
Q6. Vitamin B5 is also known as:
a) Pyridoxine
b) Pantothenic acid
c) Cobalamin
d) Thiamine
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Correct Answer: b) Pantothenic acid
Explanation: Vitamin B5, or Pantothenic acid, is essential for the synthesis of coenzyme A (CoA) and is critical in the metabolism and synthesis of carbohydrates, proteins, and fats.
Q7. Beriberi is a disease associated with deficiency of which vitamin?
a) Vitamin B1
b) Vitamin B3
c) Vitamin B6
d) Vitamin B12
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Correct Answer: a) Vitamin B1
Explanation: Beriberi is caused by a deficiency in Vitamin B1 (Thiamine). It affects the nervous and cardiovascular systems, leading to symptoms like weakness, pain in limbs, and irregular heart rate.
Q8. Which fruit is known for its high Vitamin C content?
a) Banana
b) Apple
c) Orange
d) Grape
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Correct Answer: c) Orange
Explanation: Oranges are well-known for their high Vitamin C content. Vitamin C is important for immune function, skin health, and the absorption of iron from food.
Q9. Which of these vegetables is a good source of Vitamin C?
a) Potato
b) Broccoli
c) Onion
d) Eggplant
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Correct Answer: b) Broccoli
Explanation: Broccoli is a good source of Vitamin C, which is important for the growth, development, and repair of body tissues. It’s also found in other vegetables and fruits.
Q10. How does smoking affect the Vitamin C requirement in individuals?
a) Decreases it
b) Increases it
c) Does not affect it
d) Changes it unpredictably
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Correct Answer: b) Increases it
Explanation: Smoking increases the requirement for Vitamin C as it raises the body’s oxidative stress. Smokers are advised to consume more Vitamin C to counteract this.