Cultured marble is less expensive and is made from real chips of natural marble embedded in plastic. It's available in sheet form and in standard counter dimensions of 19 and 22 inches deep. Cultured marble comes with or without a wash basin molded into it, for $50 to $80 per running foot, installed.
The Chemistry of Biology: Proteins. Proteins. Proteins are organic compounds that contain the element nitrogen as well as carbon, hydrogen, and oxygen. Proteins are the most diverse group of biologically important substances and are often considered to be the central compound necessary for life.
Proteins are complex molecule composed of amino acids and necessary for the chemical processes that occur in living organisms.Proteins are basic constituents in all living organisms.ome proteins, such as hemoglobin, are composed of more than one protein subunit (polypeptide chain). The spatial conformation of these chains is known as the quaternary structure. Quaternary structure is maintained by the same kinds of forces that determine tertiary structure.