The present title "Biomolecules" is a composite subject and for satisfactority expounding it, there is needed to have full competence in both chemistry and biology. It has been written to serve a dual function: first, to make students of various related disciplines of life science aware of certain basic biochemical principle and second, to use these principle to analysis commonly occurring health related problems in terms of their biochemical components. In the text the structure and properties of the major classes of biomolecules have been dealt it simple, lucid and easy understandable language. It deals with and study of the composition, the synthesis compounds found in the living organisms. It encompasses all the chemical reactions carries out by cells. The primary goal has been to provide useful information within the overall framework at appropriate points. The book is eminently suited to the students of biology, and medicine as it provides a good non-mathematical introduction to biomolecules, and at the same time it can be of value to the general students, researches as well as the teachers of the related fields.