This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Drug resistance is not transmitted by - \nSelect and explain. \nA. HFr, B. Transposons, C. Plasmid, D. Chromosomes', 'role': 'user'}, {'content': "Answer: A \nExplanation: Factor: The F factor is a tramsfer factor that contains the genetic information necessary for the synthesis of sex pilus and for self-transfer but is devoid of other identifiable genetic markers such as drug resistance. Cells carrying the F factor have no distinguishing feature other than their ability to mate with F - cells and render them F+. The F factor is actually an episode and has the ability to exist in some cells in the integrated data or inseed into the host chromosome; such cells are able to transfer the chromosomal gene to recipient cells with high frequency and are known as Hfr cells. Following conjugation with an Hfr cell an F- only rarely becomes F+ though it receives chromosomal genes from the donors. REF:Ananthanarayan and Panicker's Textbook ofMicrobiology 8thEdition pg no:65", 'role': 'assistant'}]