Nucleosides of RNA and DNA-
| Base | Ribonucleosides (RNA) | Deoxyribonucleosides (DNA) |
| Adenine | Adenosine (A) | Deoxyadenosine (dA) |
| Thymine | Thymidine (T) | Deoxythymidine (dT) |
| Uracil | uridine (U) | Deoxyuridine (dU) |
| Guanine | guanosine (G) | Deoxyguanosine (dG) |
| cytosine | cytidine (C) | Deoxycytidine (dC) |
| Hypoxathine | Inosine (C) | - |