Question

question 9 (1 point) saved in comparing the dna molecule to a twisted ladder, which of the following would be on the steps or rungs of the ladder? phosphate groups sucrose (sugar) deoxyrlbose (sugar) nitrogen bases

Explanation:

In the DNA double - helix structure, which is likened to a twisted ladder, the sides of the ladder are made of alternating sugar (deoxyribose) and phosphate groups. The steps or rungs of the ladder are formed by the nitrogen - bases that pair with each other (adenine with thymine, and cytosine with guanine).

Answer:

D. nitrogen bases