DNA nucleotides are composed of the sugar deoxyribose, a phosphate group, and one of four nitrogen bases: adenine(A), thymine(T), guanine(G), cytosine(C).
Atom, in that DNA is constructed of nucleotides and nucleotides are constructed of atoms.
DNA is composed of nucleotides. DNA is essentially a polymer made up of nucleotide monomers
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it is a monomer of nucleosides