| Author | 1 Posts |
nadiabarati
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R factors:
A. Are small plasmids which encode resistance to only one type of antibiotic
B. Contain plasmid elements (replication origins, incompatibility determinants, etc.) that were widespread in the pre-antibiotic era
C. Represent genetically engineered cloning vectors which have escaped into pathogenic bacteria
D. All of the above are correct
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