In the DNA helix, which part of the nucleotide forms the sides of the ladder, the backbone? A. Pentose sugar and Nitrogen base B. Phosphate group and Carboxylic acid C. Pentose sugar and Phosphate group D. Nitrogen base and Carboxylic acid

The response is C. Pentose sugar and Phosphate group

Explanation:

The backbone of the DNA helix is formed by phosphate groups and sugars that are connected by phosphodiester bonds. The four (4) nitrogen bases are localized in the center of the DNA helix, where Adenine pairs with guanine, and thymine with cytosine

C, it is made up of a phosphate group and a sugar. nitrogen bases are in the middle; think of them as the "steps" in the ladder.