what are the differences and similarities between dna and rna?
Both DNA and RNA have four nitrogenous bases each—three of which they share (Cytosine, Adenine, and Guanine) and one that differs between the two (RNA has Uracil while DNA has Thymine). ... Secondly, DNA is double-stranded while RNA is single stranded. Thirdly, DNA is more structurally stable compared to RNA.