Bissoy.com
Doctors Medicines MCQs Q&A

  1. Vitamin - A
  2. Vitamin - D
  3. Vitamin - E
  4. Vitamin - K
4 views

1 Answers

Option 1 : Vitamin - A

The correct answer is 1 i.e. Vitamin - A.

Explanation: 

  • Vitamin: They are the compounds essential for the metabolic activities of our body but in very small quantities.
  • These do not provide energy but control energy-yielding reactions of our body. 
  • The term 'vitamin' was coined by Casimir Flunk.
  • Based on solubility vitamins are of two types:
    • Fat-soluble vitamin: Vitamin A, D, E, and K.
    • Water-soluble vitamin: Vitamin B complex and C.
  • Our body can synthesize vitamin - D and K.
    Vitamins Their importance
    Vitamin-A
    • Steenbock (1919) discovered the vitamin-A and Karrear (1931) determined the structure of vitamin-A.
    • It is also called as the anti-infective vitamin.
    • It is necessary for healthy eyesight (normal vision).
    • It is destroyed by strong light.
    • The main sources are yellow or green leafy vegetables, carrot, papaya, ripe, mango, milk, etc.
    • Deficiency causes night blindness (patient cannot see the object in dim light) and xerophthalmia or keratomalacia (dryness and wrinkles of the outer layer of the eyeball).
    • Its other name is Retinol.
    Vitamin-D
    • It is called the poor man's vitamin and is a sterol derivative.
    • Its formation takes place under the skin in the presence of sunlight that's why also called sunshine vitamin or anti-racket vitamin.
    • It is needed for strong bones and teeth, helps in DNA synthesis, absorption of calcium and phosphorus.
    • Some main sources are egg, milk, fish liver oil, etc.
    • It affects the bones and causes rickets and osteomalacia in children and adults, respectively.
    • Its other name is Calciferol. 
    Vitamin-E
    • It is also known as beauty or anti-sterility vitamin.
    • It acts as an oxidant, helpful in making RBSs and is necessary for normal functioning of the reproductive system in males and females both.
    • The most important sources are vegetable oils, wheat, cottonseed, and animal food.
    • It is also found in green vegetables like alfalfa lettuce i.e. salad etc.
    • Its deficiency destroys the muscles and causes abnormal functioning of the reproductive system in males as well as women.
    • Its other name is Tocopherol.
    Vitamin-K
    • It was discovered by Henrik Dam (1935).
    • It is also called a naphthoquinone and is synthesized in the body by some bacteria.
    • It is a coagulation vitamin, that is why it helps in the clotting of blood.
    • The main sources are cauliflower, spinach, tomato, soybean, etc.
    • Its deficiency delays the clotting of blood and causes haemorrhage that is why also called an anti-hemorrhagic vitamin.
    • Its other name is Phylloquinone.
4 views

Related Questions