Transposable Genetic Elements · Zoology

Retrotransposons move within the genome by means of:

  1. DNA intermediates
  2. Protein intermediates
  3. RNA intermediates
  4. Circular plasmid intermediates
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Correct answer: RNA intermediates

Retrotransposons transpose via an RNA intermediate: the element is first transcribed into RNA, then reverse-transcribed back into DNA, which integrates at a new chromosomal site — a mechanism similar to the replication cycle of retroviruses.

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