Some bacterial characteristics are determined by plasmids L Antibiotic resistance Many bacteria can become resistant to antibiotics by acquisition of a plasmid 2. Colicins and bacteriocins Another property conferred by some plasmids that has been widely studied is the ability to produce a protein which has an antimicrobial action 3. Virulence determinants In some bacterial species toxin genes are carried on plasmids4 Some bacterial characteristics are determined by plasmids 1.Antibiotic resistance Many bacteria can become resistant to antibiotics by acquisition of a plasmid 2.Colicins and bacteriocins Another property conferred by some plasmids that has been widely studied is the ability to produce a protein which has an antimicrobial action 3.Virulence determinants In some bacterial species toxin genes are carried on plasmids