* Structure:

* ATP has an adenine base, ribose sugar, and three phosphate groups.

* RNA also has an adenine base, ribose sugar, and a phosphate backbone.

* DNA uses deoxyribose sugar instead of ribose.

* Function:

* ATP is the primary energy currency of cells, similar to how RNA plays multiple roles, including carrying genetic information and participating in protein synthesis.

* DNA primarily stores genetic information.

While all three molecules share some similarities, the presence of ribose sugar in both ATP and RNA makes them structurally and functionally closer than ATP and DNA.