The greater the number of phosphates, the greater the energy contained in the molecule. Organic molecules are carbon-based, whereas inorganic molecules are not. Each class of macromolecules is built up from subunits. Except for cellulose, they are easily assembled and disassembled. One type of subunit can be converted into another through biochemical reactions in the body.
Function follows structure.
A small change in structure can lead to a big change in function . Carbon, for example, is found in diamonds and graphite, carbon dioxide, and gasoline as well as living things. Life is highly organized. Organization requires a continuous investment of energy. Energy is stored in the bonds of molecules.