Asked in BiologyGenetics
What are molecular units that join to form DNA?
January 12, 2009 9:54PM
DNA (deoxyribonucleic acid) is an organic polymer whose monomer is a nucleotide. A nucleotide is made up of a nitrogenous base (Adenine, Guanine, Cytosine, and Thymine in DNA, Uracil replaces Thymine in RNA), a pentose (5 carbons) sugar (deoxyribose in DNA and ribose in RNA), and a number of phosphate (PO4) groups ranging from 1 to 3 (1 in polymeric form, 2 or 3 when free in solution).