Transposons

Question

Transposons

Quizplus · Accepted Answer

Transposons are genetic elements that have the ability to move within and between genomes, often resulting in the duplication or deletion of genes. They are found in all domains of life, including bacteria, archaea, and eukaryotes.

Answer: B
 Some transposons, such as retrotransposons, use a DNA intermediate to make duplicates during their insertion into a genome. However, not all transposons use a DNA intermediate - some, such as cut-and-paste transposons, move entirely through a cut-and-paste mechanism.

Answer: D
 Transposons are actually a major component of the genomes of many organisms, including humans. For example, transposons comprise 45% of the human genome, and are thought to have played a significant role in shaping human genome evolution.