AP BIOLOGY

Detailed explanation-1: -Explanation: The direct repeat on either side of the insertion element is a hallmark of IS element. They are 5 to 11 bp long sequences immediately adjacent to both ends of the inserted element. Explanation: The enzyme that catalyzes the transposition of an IS element is called a transposase .

Detailed explanation-2: -The two types of transposons are – Class 1 TE (Transposable Element) and Class 2 TE.

Detailed explanation-3: -Transposable elements (TEs) are mobile DNA sequences capable of replicating themselves within genomes independently of the host cell DNA. They typically range in length from 100 to 10, 000 base pairs, but are sometimes far larger (6).

Detailed explanation-4: -LTR retrotransposons have direct long terminal repeats that range from  100 bp to over 5 kb in size.

Detailed explanation-5: -The transposable elements of bacteria are generally retrotransposons. Explanation: Most transposable elements in bacteria transpose directly as DNA. In contrast, most mobile elements in the eukaryotes are retrotransposons.