Question

 

Explain the role of plasmids in horizontal gene transfer in bacteria, including F, Hfr, and F' plasmids, and their significance in antibiotic resistance, virulence, and genetic recombination.

29 Jan 2026
Answer :
Word Count : 466
Plasmids are extrachromosomal, circular DNA molecules that replicate independently of the bacterial chromosome and play a crucial role in horizontal gene transfer (HGT) among bacteria. Unlike the chromosomal DNA, plasmids can move between cells, allowing the rapid spread of genetic traits, including antibiotic resistance, virulence factors, and metabolic capabilities. HGT mediated by plasmids is a key mechanism in bacterial evolution and adaptation, contributing significantly to biodiversity at the microbial level. One of the primary plasmids involved in HGT is the F (fertility) plasmid. F plasmids carry genes necessary for the formation of a _________ ______ _______ _________ ___ _______ ___ __________ ______ _________ _______.
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