AP BIOLOGY

Detailed explanation-1: -Splicing occurs in all the kingdoms or domains of life, however, the extent and types of splicing can be very different between the major divisions. Eukaryotes splice many protein-coding messenger RNAs and some non-coding RNAs. Prokaryotes, on the other hand, splice rarely and mostly non-coding RNAs.

Detailed explanation-2: -In genetics, splicing is a modification of genetic information after transcription, in which introns of precursor messenger RNA (pre-mRNA) are removed and exons of it are joined. Since in prokaryotic genomes introns do not exist, splicing naturally only occurs in eukaryotes.

Detailed explanation-3: -In prokaryotes, splicing is a rare event that occurs in non-coding RNAs, such as tRNAs (22). On the other hand, in eukaryotes, splicing is mostly referred to as trimming introns and the ligation of exons in protein-coding RNAs.

Detailed explanation-4: -Splicing occurs in the nucleus before the RNA migrates to the cytoplasm. Once splicing is complete, the mature mRNA (containing uninterrupted coding information), is transported to the cytoplasm where ribosomes translate the mRNA into protein. The pre-mRNA transcript contains both introns and exons.

Detailed explanation-5: -Does mRNA splicing occur in prokaryotes? Splicing of mRNA is a form of post-transcriptional modification. mRNA splicing is not a phenomenon that occurs in prokaryotes, it is exclusive to eukaryotes.