Plasmids help in survival of bacteria.??
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Plasmids help bacteria to survive stress
The bacteria spread on the right-hand side of the plate contain a plasmid that confers resistance to kanamycin, so they can grow colonies even when it is present. ... Other plasmids contain genes that help the host to digest unusual substances or to kill other types of bacteria.
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Some plasmids can make their host bacterium resistant to an antibiotic. ... For instance, many plasmids contain genes that, when expressed, make the host bacterium resistant to an antibiotic (so it won't die when treated with that antibiotic).
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