Question

how do the structures of rna and dna differ? view available hint(s) guanine pairs with cytosine in dna, while guanine pairs with adenine in rna. only rna, and not dna, has a primary structure. adenine pairs with thymine in dna, while adenine pairs with uracil in rna. the sugar - phosphate backbone of dna is formed by phosphodiester linkages, while the sugar - phosphate backbone of rna is formed by peptide bonds. dna contains the sugar ribose, while rna contains the sugar deoxyribose.

Explanation:

In DNA, adenine pairs with thymine. In RNA, adenine pairs with uracil. This is a key structural difference. DNA has deoxyribose sugar and RNA has ribose sugar. Both have a sugar - phosphate backbone formed by phosphodiester linkages and both have primary structures. Guanine always pairs with cytosine in both DNA and RNA.

Answer:

Adenine pairs with thymine in DNA, while adenine pairs with uracil in RNA.