Question

question 5
1 pts
the
ungs\ of the dna twisted ladder consist of:

deoxyribose

nitrogen bases

phosphate

sugar-nitrogenous base

sugar-phosphate

Explanation:

To determine the "rungs" of the DNA twisted ladder, we recall the structure of DNA. The DNA double helix is like a ladder where the sides (backbone) are made of sugar (deoxyribose) and phosphate groups. The rungs (the horizontal parts connecting the two sides) are formed by pairs of nitrogen bases (adenine - thymine, guanine - cytosine) that hydrogen - bond to each other. Deoxyribose is part of the backbone's sugar component, phosphate is part of the backbone, "sugar - nitrogenous base" is not the structure of the rungs, and "sugar - phosphate" is the backbone. So the rungs consist of nitrogen bases.

Answer:

B. nitrogen bases