複選題28. Which of the following statements is correct regarding DNA transposition? (A) Autonomous transposons cannot move in the absence of nonautonomous transposons. (B) Virus-like retrotransposition involves target-site-primed reverse transcription. (C) RNA-mediated transposition involves insertion of RNA into a new target site. (D) Transposase cleaves the 5' ends of the element DNA and leaves the 3' terminating strands uncut. These strands are called the nontransferred strands. (E) Replicative transposition results in cointegration with 2 copies of transposon.