THE MOLECULAR BASIS OF INHERITANCE
TRANSPOSONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Detailed explanation-1: -Non-LTR retrotransposons: general structure. Full length, autonomous non-LTR retrotransposons typically contain one or two open reading frames (ORFs). The general structure of three model examples, the Bombyx mori R2 element, the human L1 element, and the Drosophila melanogaster I factor, are depicted in Figure 1.
Detailed explanation-2: -DNA transposons move using a cut-and-paste mechanism [6]. In contrast, retrotransposons move in a copy-and-paste fashion by duplicating the element into a new genomic location via an RNA intermediate [7]. Thus, retrotransposons increase their copy number more rapidly than DNA transposons.
Detailed explanation-3: -Retroviruses and LTR retrotransposons are transposable elements that encapsidate the RNAs that are intermediates in the transposition of DNA copies of their genomes (proviruses), from one cell (or one locus) to another.
Detailed explanation-4: -Retroviruses and long terminal repeat (LTR) retrotransposons share a common structural organization. The main difference between these retroelements is the presence of a functional envelope (env) gene in retroviruses, which is absent or nonfunctional in LTR retrotransposons.