Virology. Explain the make up and role of different complexes: for example the components of the spliceosome made up and its role. Solution Answer=1] components of spliceosome made up &its roles Spliceosome is large & compex molecular machine assembled from snRNAs & protein complexes 1] sn RNAs = it is composed of 5 small nuclear RNAs are U1,U2,U4,U5 ,U6 Roles - they participate in most RNA -RNA & RNA -Protein interactions 2] associated protein factors = snRNPs or small nuclear ribonucleoproteins are RNA protein complexes that combine with unmodified mRNA & various other proteins to form spliceosome 2] Multiprotein complex = is a group of 2 or more associated polypeptide chains example -proteasome - important for molecular degradation 3] Major histocompatibility compex (MHC )=set of cell surface proteins role- to bind antigen derived from pathogens & display them on the call surface for recognition by appropriate T cells.