- Deoxyribonucleic acid.
- a helical, double stranded molecule composed of four different nucleotide subuints (A, T, G, and C) that carries the genetic instructions from one generation to the next
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row
- An organic acid and polymer composed of four nitrogenous bases--adenine, thymine, cytosine, and guanine linked via intervening units of phosphate and the pentose sugar deoxyribose. DNA is the genetic material of most organisms and usually exists as a double-stranded molecule in which two antiparallel strands are held together by hydrogen bonds between adeninethymine and cytosine-guanine.