are plasmids found in all bacteria
Rating Newest Oldest. Best Answer: No, plasmids are not necessary to allow bacteira to survive .Plasmids are typically not strictly for survival and are only beneficial under certain conditions. The DNA necessary for bacterial life is usually in the chromosomal DNA. The plasmid DNA may confer benefits but the function of most plasmid DNA is currently unknown. Scientists have selected for plasmid free bacteria, and plasmid-free strains, especially E. coli, are available commercially.