Question

What are the 3 biological molecules that make up a DNA? If DNA structure is resembled to a ladder then what molecules make up the sides of a ladder and what molecule makes the steps of a ladder?

Answer 1

The three biological molecules that make up DNA are nucleotides, sugar-phosphate backbones, and nitrogenous bases. The sides of DNA resemble the sides of a ladder and are made up of sugar-phosphate backbones, while the steps of the ladder are made up of pairs of nitrogenous bases.

Step-by-step explanation:

The three biological molecules that make up a DNA are nucleotides, sugar-phosphate backbones, and nitrogenous bases.

The sides of a DNA molecule, which resemble the sides of a ladder, are made up of alternating sugar and phosphate groups, forming the sugar-phosphate backbones.

The steps of the ladder are made up of pairs of nitrogenous bases, specifically adenine (A) with thymine (T), and guanine (G) with cytosine (C).