Plasmids are typically small, circular chromosomes that encode nonessential genes and replicate independently of the host chromosome. In molecular biology, plasmids are known as vectors. There are multiple different types of vectors; the most common types are cloning vectors, shuttle vectors, expression vectors, cosmids, and bacteriophages. Match each plasmid type to the correct description. Drag and drop the terms on the left to fill in the blanks. Cosmids and bacteriophages Cloning vectors Shuttle vectors Expression vectors 1.: replicate and are stably maintained in two (or more) unrelated host organisms 2.: derivatives of viruses used as vectors 3.: allow the experimenter to control the transcription and translation of cloned genes 4.: allow insertion of foreign DNA at a restriction site that cuts the vector without affecting its replication