LIFE SCIENCE

Detailed explanation-1: -Small nuclear ribonucleoproteins (snRNPs) are protein–ribonucleic acid (RNA) complexes defined by a core noncoding RNA of approximately 100–600 nucleotides and tightly bound proteins that together accumulate in the nucleus.

Detailed explanation-2: -The U1, U2, U4, U5 and U6 small nuclear ribonucleoprotein particles (snRNPs) are essential elements of the spliceosome, the enzyme that catalyzes the excision of introns and the ligation of exons to form a mature mRNA.

Detailed explanation-3: -The key difference between snRNA and snRNP is that snRNAs are small nuclear RNA molecules while snRNPs or small nuclear ribonucleoproteins are small nuclear RNA molecules with proteins. snRNAs are non-coding, biologically active small RNA molecules with an average size of 150 nucleotides.