Genetic elements that collect and express genes carried on mobile segments of DNA called cassettes are known as
A) transposable elements.
B) integrons.
C) plasmids.
D) pathogenicity islands.

Question

Quizplus · Accepted Answer

Integrons are genetic elements that can capture and express genes carried on mobile DNA elements called cassettes, which contain promoter and recombination sites. Integrons are found mainly in bacterial chromosomes but can also be plasmid-borne. Transposable elements also move DNA segments, but they do not necessarily have cassettes or a promoter for expression. Plasmids and pathogenicity islands are also mobile genetic elements, but they generally do not use cassettes as a means of gene expression.

Genetic Elements That Collect and Express Genes Carried on Mobile