Practice question

Retrohoming describes mobility mechanism of Group II introns encoding reverse transcriptase and sometimes endonuclease in same polypeptide. Pathway initiates with intron RNA reverse splicing into single-stranded DNA target, then using target 3' end as primer, intron-encoded RT reverse-transcribes intron RNA into cDNA. Second strand synthesized by host repair polymerase. Thus retrohoming depends on reverse transcription converting RNA intermediate to DNA, producing permanent insertion. This retromobility inspired development of targetron gene editing biotechnology for site-specific gene disruption in bacteria. This refined regulation supports accurate ribosomal assembly, quality control and translational fidelity under diverse physiological conditions and growth states.