Carbon is the backbone for all organic molecules, like carbohydrates, proteins, nucleic acids, and fats. Cells must have these compounds in order to survive and many cellular … structures are composed of organic, carbon containing molecules.ecause since carbon is a group 4 element it has four bonds and can form an extremely wide range of compounds and molecular structures. Also, being in the middle of the period … ic table it can bond with both metals and non metals. It is the main component of almost all long chain molecules.