Question

dna can be visualized as a ladder in which the sides (\backbone\) would be: hydrogen-bonded sugars. sugar from one nucleotide covalently bound to the phosphate on the next nucleotide. hydrogen bonds between complementary nucleotides. hydrogen-bonded sugars to bases. covalently bonded phosphate to bases

Explanation:

The DNA backbone consists of alternating deoxyribose sugar and phosphate groups. Each sugar is covalently linked to the phosphate of the adjacent nucleotide via phosphodiester bonds, forming the "sides" of the ladder structure. Hydrogen bonds between complementary bases form the "rungs," not the backbone. Other options describe non-backbone interactions (hydrogen bonds between bases or sugar-base bonds).

Answer:

sugar from one nucleotide covalently bound to the phosphate on the next nucleotide.