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DNA, which stands for Deoxyribonucleic acid is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms. The main role of DNA molecules is the long-term storage of information. These nucleic acids consist of long chains if chemical units called nucleotides. Nucleic acids are information storage molecules that provide the directions for building proteins. Described by the DNA testing centre, Inc., “DNA is found inside the chromosome, inside the nucleic of the cell. Each chromosome is made up of a tightly coiled strand, a molecule of DNA. The bases in the opposite strands are arranged such that where there is an adenine (A) in one strand, the other strand has a thymine (T) and where there is a guanine (G) in one strand, the other strand has a cytosine (C).” (The DNA Testing Centre, Inc., 2007). Each strand is made up of a sugar covalently linked to a phosphate which is covalently linked to another sugar and so on.......

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