Chlorophyll is a photosensitive green pigment found in plants; it absorbs light energy, thus plays a vital role in photosynthesis.
Oxygen carrier protein in our red blood cells.
A biologically and practically important organic compound.
One of the 20 amino acids that make up proteins. Its amino group and the 3rd carbon atom of the side chain form a ring.
A heterocyclic aromatic organic compound, its derivatives include guanine and adenine.
A basic heterocyclic organic compound; a colourless, pungent toxic liquid.
A heterocyclic organic compound, its derivatives are thymine, cytosine and uracil.
An exercise about the groups and structure of organic nitrogen compounds.