Nitrogenous compounds are chemical substances that contain nitrogen atoms. They play essential roles in various biological processes, including the formation of amino acids, which are the building blocks of proteins. These compounds are also crucial in the structure of nucleic acids, such as DNA and RNA, which carry genetic information. Common examples of nitrogenous compounds include urea, which is produced in the body as a waste product, and nitrates, which are important for plant growth. Nitrogen is a vital element in the environment, and its compounds are found in fertilizers, helping to enhance soil fertility and crop production.