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What is Transmission of R factor is by ? and explain in detail?
Ans. is 'a' i.e., Conjugation Conjugation Bacterial conjugation is the transfer of genetic material between bacteria through direct cell to cell contact or through a bridge- like connection between two cells. Conjugation is process where by a donor (male) bacterium makes physical contact with a recipient (female) bacterium. Donor status is determined by the presence of plasmid. This plasmid codes for specialized fimbria (sex pilus) and for self transfer. Sex pilus (conjugation tube) helps in transfer of genetic material from male bacterium to female bacterium. The plasmid is known as transfer factor (sex factor or feility factor). Plasmid may be R factor, which codes for transferrable multiple drug resistance. The DNA of the plasmid replicates during transfer so that each bacterium receives a copy - Recipient becomes donor and the donor retains its donor status.