nucleotide is a kind of repeating unit in dna
polynucleotide is not nucleotide. nucleotide_structure_sequence is list. nucleotide is monomer. nucleotide is molecule. polynucleotide is nucleotide. oligonucleotide is nucleotide. adenine_nucleotide is nucleotide. dna_molecule_nucleotide is nucleotide. dna_molecule_nucleotide is not nucleotide. dna_polymer is polynucleotide.