what is DNA?
Deoxyribonucleic acid (DNA) is the molecule found in the nucleus of a cell and it contains crucial informations that determine the specific biological traits of each of us.
You should know that your physichal characteristics are determined by proteins. A sequence of DNA nucleotides gives the proper instructions to make a protein, hence, this sequence specifies how are linked the amino acids that make up the protein and what are the types of amino acids.
The number of amino acids is of 20 and three nucleotides form a codon.
A protein is specified by 300 to 2000 nucleotides and each gene encodes a protein. One protein is different from other protein and this difference is given by the specific sequence of amino acids.
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA).