guanine is a kind of nitrogenous base in dna / rna
guanine_ribonucleotide is guanine_nucleotide. guanine is nitrogen_base. guanine_ribonucleotide is ribonucleotide. guanine_ribonucleotide is not guanine_nucleotide. guanine is not nitrogen_base. guanine_nucleotide is not nucleotide. guanine_deoxyribonucleotide is deoxyribonucleotide. guanine_ribonucleotide is not ribonucleotide. guanine_deoxyribonucleotide is guanine_nucleotide. guanine_nucleotide is nucleotide.