What does snRNA primarily participate in within eukaryotic cells?

snRNA, or small nuclear RNA, primarily participates in RNA processing within eukaryotic cells. Its main role is in the splicing of pre-messenger RNA (pre-mRNA), where it helps to remove non-coding sequences (introns) and joins the coding sequences (exons) together to form a mature mRNA transcript. This process is essential for the proper expression of genes and is a crucial step in post-transcriptional modification of RNA.

In addition to splicing, snRNA is also involved in other aspects of RNA processing, including the formation of the spliceosome, a complex responsible for recognizing splice sites and facilitating the splicing reaction. This makes snRNA significant for the regulation of gene expression and the production of functional proteins, thereby underscoring its vital role in the overall process of gene expression in eukaryotic cells.