Here's why:
* DNA is made of nucleotides. Each nucleotide consists of three parts:
* Deoxyribose sugar (a five-carbon sugar)
* Phosphate group
* Nitrogenous base
* There are four types of nitrogenous bases in DNA:
* Adenine (A)
* Thymine (T)
* Guanine (G)
* Cytosine (C)
* The specific sequence of these bases is what carries the genetic information. The order of bases determines the instructions for building proteins and other molecules.
So, while the sugar and phosphate groups are the same in all DNA nucleotides, the nitrogenous base is what differentiates them. This difference in bases allows for the vast diversity of genetic information stored in DNA.
