A spliceosome is a complex assembly of RNA and protein molecules that removes introns from pre-mRNA during splicing.
snRNA (Small Nuclear RNA): A type of RNA that combines with proteins to form spliceosomes.
Pre-mRNA: The initial transcript from DNA transcription which contains both exons and introns.
A process by which different combinations of exons are joined together to produce different mRNA molecules from the same gene, leading to diverse proteins.