The base of each cloud is flat and the top of each cloud has rounded towers. When the top of the cumulus clouds resemble the head of a cauliflower, it is called cumulus congestus or towering cumulus. These clouds grow upward and they can develop into giant cumulonimbus clouds, which are thunderstorm clouds.
Peptide Bond. Covalent bond between the nitrogen of the amino group of one amino acid and the carbon of the carboxyl group of a second amino acid, joining the 2 amino acids together in a peptide or protein.
Nitrogen, contained in amino acids, proteins, and DNA, is necessary for life. While there is an abundance. of nitrogen in nature, almost all is in an unreactive form (gaseous nitrogen, N2) that is not usable by most. organisms. In the absence of human intervention, the supply of reactive nitrogen in the environment is not. sufficient to sustain the current abundance of human life.