For population 25 years and over in Revere: 1  High school or higher: 82.2%. 2  Bachelor's degree or higher: 19.5%. 3  Graduate or professional degree: 6.2%. 4  Unemployed: 5.7%. 5  Mean travel time to work (commute): 33.2 minutes.
Plasmids are extra chromosomal, double stranded, circular DNA molecules present in bacteria. Different kinds of bacterial plasmids based on encoded genes (their roles). F-plasmids (fertility factor or sex factors): Bacterial cells with F plasmids are called F+ cells and acts as donor cells or +strain during bacterial conjugation.
To be an effective tool for scientists, a plasmid typically possesses three basic features: a multiple cloning site, an origin of replication, and a selectable marker. Let's see how each of these plasmid features plays a key role in genetically engineering bacteria to produce human insulin.t is a critical component of a DNA plasmid because it ensures the plasmid is passed from mother to daughter cells during cell division. A selectable marker is a gene that enables identification of a genetically modified organism of interest by removing or inhibiting unwanted organisms.