Question

Nitrogen forms the essential constituent of

• A. Carbohydrates
• B. Fats
• C. Mineral Salts
• D. Proteins

Answer 1

The correct option is D

Proteins

The correct option is (D):

Explanation of the correct option :

1. Proteins are the abundant structural and functional organic molecules of the living organism which is formed of amino acids.
2. Proteins carry out many functions like transport of substances, fighting against infectious pathogens, functioning as hormones and enzymes etc.
3. Nitrogen is a naturally occurring element that is required for plant and animal growth and reproduction.
4. Nitrogen is the main constituent found in amino acids as amino group.
5. Hence nitrogen is an essential constituent of proteins.

Explanation of the incorrect option :

Option (A):

Carbohydrates are the major source of cellular energy which are formed of carbon, hydrogen and oxygen.

Option (B):

Fats are made up of a glycerol backbone and three fatty acid tails.

Option (C):

Mineral salts are primarily made up of sodium and chloride molecules.

Final answer: Nitrogen forms the essential constituent of proteins.