জৈব অণু ও তাদের বৈশিষ্ট্য (Part 2) | Biology | Class 9 | Chhaya

It can be understood by studying different levels of organization of life, that the body of a living organism is primarily composed of different organic and inorganic molecules. The next level of organization of the body of a living organism is the cellular level. The major inorganic compounds, which are essential for living organisms, are water, inorganic acids, bases, salts and inorganic gases like oxygen, carbon dioxide, nitric oxide. Smaller organic molecules include simple sugars, (like glucose, ribose, etc.) different amino acids, fatty acids and nucleotides. Complex sugars, proteins, lipids and nucleic acids are large organic molecules.