Plasmide
A circular piece of DNA that exists apart from the chromosome and replicates independently of it. Bacterial plasmides carry information that renders the bacteria resistant to antibiotics.
plasmid
Autonomous self-replicating extra-chromosomal circular DNA molecule present in bacteria and yeast.
Note 1: Plasmids replicate autonomously each time a bacterium divides and are transmitted to the daughter cells.
Vector: 1. An organism, often an insect or rodent, that carries disease. 2. Plasmids, viruses, or bacteria used to transport genes into a host cell. A gene is placed in the vector; the vector then "infects" the bacterium.
cosmid A vector that is similar to a plasmid but it also contains the cohesive sites (cos site) of bacteriophage lambda to permit insertion of large fragments of dna and in vitro packaging into a phage.
 See also: Waste, Concentration, Organism, Water, Risk
  
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