All episomes are plasmids but all plasmids are not episomes. Justify.

An episome is a type of genetic element that can exist either as a separate molecule or as part of the chromosome. Plasmids are also separate genetic elements that can exist independently of the chromosome. However, not all plasmids are episomes.

Episomes are typically characterized by their ability to move between the chromosome and a separate molecular form, and they often carry genes that are beneficial to the host cell. Plasmids, on the other hand, can carry a variety of different types of genetic material, including genes that are beneficial, neutral, or harmful to the host cell.

Therefore, it is possible for a plasmid to be an episome if it has the ability to move between the chromosome and a separate molecular form, but not all plasmids possess this characteristic.