Microbial Recombination and Gene Transfer
In the extracellular medium, DNA-degrading enzymes would likely be to prevent transfer of DNA by

conjugal transfer by a self-transmissible plasmid
None of these
natural transformation
generalized phage transduction

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Microbial Recombination and Gene Transfer
Which of the following statement describes plasmids?

None of these
A complex membrane structure that covers the chromosome of bacteria
Another name for a protoplast
Small, circular DNA molecules that can exist independently of chromosomes commonly found in bacteria

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