Small nuclear RNAs (snRNAs), including U1snRNA and U4snRNA, play important roles in splicing. U1snRNA mediates splicing by binding to 5' splice sites and removing introns, while U4snRNA forms a complex with U1snRNA, U2snRNA, and U5snRNA called the spliceosome to remove introns from pre-mRNA. U4snRNA also has a specific role in the 3' end of hnRNA. Ribozymes such as peptidyl transferase rRNA also mediate RNA splicing through their enzymatic activity.

1. Splicing mechanism
Small nuclear ribonucleic acid (snRNA): It is also known as U-RNA as it contains many uridine
contents in its complex structure. This is composed of 150 nucleotides nearly to produce
spliceosomes and to act along with snRNP. This snRNA has a predominant role in splicing. The
roles of U1snRNA is different to that of U4snRNA and U1snRNA is mainly going to mediate
splicing by binding to 5'-splice site when snRNP (small nuclear ribonucleoprotein particles) to
remove latriant introns but the U4snRNA is going to
Peptidyl transferase rRNA is different in their function to U1snRNA,U4snRNA in RNP as
ribozymes and these ribozymes are enzymatic RNA molecules & they are going to mediate RNA
splicing. The peptidyl transferase activity is possessed by 5S and 23S rRNA of ribosomes. The
role of U4snRNA is going to form a complex to form as U1/U2/U4/U5 on pre-mRNA as
spliceosome to remove introns. However, U4snRNA is specifically has specific role in 3 prime
end of hnRNA
Solution
Splicing mechanism
Small nuclear ribonucleic acid (snRNA): It is also known as U-RNA as it contains many uridine
contents in its complex structure. This is composed of 150 nucleotides nearly to produce
spliceosomes and to act along with snRNP. This snRNA has a predominant role in splicing. The
roles of U1snRNA is different to that of U4snRNA and U1snRNA is mainly going to mediate
splicing by binding to 5'-splice site when snRNP (small nuclear ribonucleoprotein particles) to
remove latriant introns but the U4snRNA is going to
Peptidyl transferase rRNA is different in their function to U1snRNA,U4snRNA in RNP as
ribozymes and these ribozymes are enzymatic RNA molecules & they are going to mediate RNA
splicing. The peptidyl transferase activity is possessed by 5S and 23S rRNA of ribosomes. The
role of U4snRNA is going to form a complex to form as U1/U2/U4/U5 on pre-mRNA as
spliceosome to remove introns. However, U4snRNA is specifically has specific role in 3 prime
end of hnRNA