Pathogenic bacteria gain resistance to antibi | vedclass

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(B) Pathogenic bacteria often acquire resistance to antibiotics through the presence of $R$-plasmids (resistance plasmids).These are small,circular,ex

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Plasmids

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(B) Pathogenic bacteria often acquire resistance to antibiotics through the presence of $R$-plasmids (resistance plasmids).These are small,circular,extrachromosomal $DNA$ molecules that exist independently of the bacterial chromosome.Plasmids carry genes that encode enzymes capable of degrading or modifying antibiotics,thereby rendering them ineffective.Since bacteria can transfer these plasmids to other bacteria through conjugation,antibiotic resistance can spread rapidly within a population.Therefore,the correct option is $B$.

Pathogenic bacteria gain resistance to antibiotics due to changes in their:

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