■■■■■国■国■ 9.1 Introduction ■■■■■■■■■■ RNA Figure 16. 1 The reproductive Provins cycles of retroviruses and retroposons involve △ alternation of reverse transcription from rNa to FRNA DNA With transcription from ■■■■■■■■■ DNA to RNA. only NTRACELLULAR■ retroviruses can generate infectious particles EXTRACELLULAR Retroposons are confined ■■■■■■■■■■ an intracellular cycle 消当 RetrovirusFigure 16.1 The reproductive cycles of retroviruses and retroposons involve alternation of reverse transcription from RNA to DNA with transcription from DNA to RNA. Only retroviruses can generate infectious particles. Retroposons are confined to an intracellular cycle. 9.1 Introduction