* Adenine (A)

* Guanine (G)

* Cytosine (C)

* Uracil (U)

These nucleotides differ from the ones found in DNA in one key way: RNA uses uracil (U) instead of thymine (T).

Each nucleotide consists of three parts:

* A nitrogenous base: This is either adenine, guanine, cytosine, or uracil.

* A five-carbon sugar: In RNA, this sugar is ribose.

* A phosphate group: This is attached to the sugar.

The sequence of these nucleotides determines the genetic code of an RNA molecule, which is crucial for protein synthesis and other cellular functions.