How does the RNA of spliceosomes recognize which areas of a primary transcript to splice?
The 5' exon-intron boundary is marked by the bases GC. Also, there is a T ribonucleotide near the end of the intron.
The 3' exon-intron boundary is marked by the bases GU. Also, there is an A ribonucleotide near the 5' end of the intron.
The 5' exon-intron boundary is marked by the bases GU. Also, there is an A ribonucleotide near the 3' end of the intron.
Introns are formed by a unique repeated sequence that makes them recognizable for splicing.