<Li> Resistance (R) plasmids, which contain genes that provide resistance against antibiotics or poisons . Historically known as R - factors, before the nature of plasmids was understood . </Li> <Li> Col plasmids, which contain genes that code for bacteriocins, proteins that can kill other bacteria . </Li> <Li> Degradative plasmids, which enable the digestion of unusual substances, e.g. toluene and salicylic acid . </Li> <Li> Virulence plasmids, which turn the bacterium into a pathogen . </Li>

Where is the dna found in a bacterial cell