Answer:
1. organic compounds
2. Protein
3. Carbon
Explanation:
Organic compounds are compounds that contain carbon atoms. Carbon atoms are linked together via covalent bonds, creating chains. This ability is one of the properties of carbon that makes it different from other elements. Many of these carbon chains make the different molecules that make up organisms.
Protein is a macromolecule that are made up of chains of amino acids bonded by peptide bonds, thus they are called polypeptide chains. Proteins have several uses in the body. One of their primary functions is aiding in the cellular processes in the form of enzymes that aid in almost all of the functions of the cell.
Carbon is an atom that has the ability to form chains, linking them together. These ability forms many of the organic molecules that make up living things. They have 4 valence electrons, allowing them to bind with other elements as well.
