* Phosphate groups: These are the negatively charged groups that link the nucleotides together in the sugar-phosphate backbone.

* Nitrogenous bases: Both RNA and DNA contain the bases adenine (A), guanine (G), and cytosine (C). However, they differ in the fourth base:

* DNA: Thymine (T)

* RNA: Uracil (U)

* Sugar: While they share the same general structure, the sugars differ slightly:

* DNA: Deoxyribose

* RNA: Ribose

Let me know if you'd like more detail on any of these components!