DNA
Deoxyribonucleic Acid or DNA is used everyday to solve very critical crimes such as murder. DNA analysis has emerged as an extremely valuable tool for the American criminal justice system. ... DNA profiling has a very high discrimination power, and is great in both the elimination and identification of suspects. DNA is very complex and contains many substances. ... DNA is a polymer, a very large molecule made by linking together a series of repeating units. The units in DNA are called nucleotides. ... There are four types of bases associated with DNA: adenine, cytosine, guanine, and thymine. DNA molecules are actually made of two DNA strands coiled together called a double helix.