One of the main properties of carbon is that it has the ability to form very stable bonds, this means that it can form very long chains and that they can be organized in different ways. Therefore, carbon is the basis of many important macromolecules in living beings such as proteins, lipids, nucleic acid (DNA), carbohydrates. These macromolecules are found in living beings, in plants, in animals, in us human beings. They are part of our organs, our cell phones, our DNA. It is so important that there is a specific branch to study all the compounds that it forms in carbon and that is organic chemistry. For all this, it is that the statement that living things are composed mainly of carbon is true.