Name two ways DNA and RNA are similar

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). ... One of the most significant similarities between DNA and RNA is that they both have a phosphate backbone to which the bases attach.

Explanation:

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They both have suga-phosphate backbone. They are made up of monomers called nucleotides.

Explanation: Nucleotides are monomeric units of nucleic acids. Nucleotides are made up of three parts: the pentose (5-carbon) sugar, a phosphate group and a nitrogenous bases. Both DNA and RNA have four nitrogenous bases but the only difference is that DNA contains Thymine while RNA contains Uracil. They both have adenine, cytosine and guanine in common. The sugar-phosphate backbone forms the rail of both DNA and RNA, each having a pentose-phosphate group but the difference is that DNA contains deoxyribose while RNA contains ribose sugar.