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.
Answers. Relevance. Rating Newest Oldest. Best Answer: A plasmid is a circle of DNA that bacteria can absorb into the cell. Many times, these new genes may help a bacteria adapt to its surrounding (i.e. the bacteria lives in an acidic environment, the new genes included in a plasmid may help the bacteria adapt to the environment).his is why an entire colony of bacteria may become immune to penicillin. Many scientists take advantage of this by inserting a gene that they want replicated into a plasmid and then inserting it into a bacteria.