Non-coding RNAs are commonly found in eukaryotic cells and serve diverse regulatory roles. Non-coding RNAs play crucial roles in complex regulatory pathways often interacting with networks of proteins, which in turn indirectly influence transcriptional processes. They are particularly involved in processes such as chromatin remodeling and cell proliferation. Examples of ncRNAs found in eukaryotes include microRNAs (miRNAs), long non-coding RNAs (lncRNAs), and transfer RNAs (tRNA). Lastly, non-coding RNAs are also involved in processes like DNA demethylation, both activating and repressing gene transcription, gene imprinting, alternative splicing, and RNA interference.