Question

Principal organic constituent of a living being in order of relative abundance is

• A. Water
• B. Protein
• C. Lipid
• D. DNA

Answer 1

The correct option is B Protein

Water present in the human body supports the metabolic reactions in the body. The enzymes which act as a catalyst in these biological reaction acts efficiently in presence of water. The salts like sodium and potassium which dissolves in the water act as a transporter.

Proteins are building blocks of the body. The proteins are made up of amino acids. Being the building block of the body proteins are found in abundance in the human body. Along with lipids it forms cell membrane and covering of the organelles in a eukaryotic and prokaryotic cell. Some of the proteins are enzymes which catalyze the biochemical reaction.

Lipids form an important component of the cell wall. It is produced by smooth endoplasmic reticulum.

DNA is genetic material present in the nucleus which is required for inheritance of character.

So, the correct answer is option B.