DNA is a polymer; its monomer units are
The monomer units of DNA are nucleotides. Each of these consist of  a 5-carbon sugar which is deoxyribose, a nitrogen containing base  attached to the sugar and a phosphate â¦ group. Judy Olmsted. 78,524 Contributions. Retired college science professor. DNA is a nucleic acid. Nucleic acids are polymers of nucleotides (also called mononucleotides).   The nucleotides in DNA are deoxyribonucleotides.   Each nucleotid â¦ e consists of a pentose (5-carbon) sugar, a nitrogen-containing base and a phosphate group.