AP BIOLOGY

Detailed explanation-1: -4. Retrotransposons transposes through the RNA intermediates. Explanation: The elements that transpose through an RNA intermediate utilizing a reverse transcriptase are called the retrotransposon. They are primarily found in eukaryotic organisms.

Detailed explanation-2: -Retrotransposons are mobile genetic elements capable of independent transposition through RNA intermediates. Retrotransposons are widespread transposable elements in eukaryotes, and constitute a major part of eukaryotic genomes in many cases.

Detailed explanation-3: -During the transposition of a retrotransposon, an RNA copy of the element is converted into DNA by a reverse transcriptase, and this DNA is inserted at a new site in the genome.

Detailed explanation-4: -Transposons can be divided based on the mechanism of transposition and integration. Class I elements, retrotransposons, use an RNA intermediate that is reverse-transcribed into a cDNA copy that reintegrates into a new genomic home.