Question

which 2 molecules forms the sides (backbone) of the dna ladder? deoxyribose and a hydrogen bond deoxyribose (sugar) and phosphate sugar and the nucleus deoxyribose and adenine

Explanation:

DNA has a double - helix structure. The backbone of the DNA molecule is composed of alternating sugar (deoxyribose) and phosphate groups. Hydrogen bonds are involved in holding the two strands of DNA together (between complementary base pairs), not in forming the backbone. The nucleus is an organelle in the cell where DNA is located, not a molecule in the DNA backbone. Adenine is a nitrogen - containing base in DNA, which pairs with thymine (A - T) via hydrogen bonds, but it is not part of the backbone.

Answer:

deoxyribose (sugar) and phosphate