Transformation experiment was first performed on which of the following bacteria?

Escherichia coli

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Streptococcus pneumoniae

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Salmonella typhi

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Pasteurella pestis

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Solution

The correct option is B Streptococcus pneumoniae
A puzzling observation was made by Frederick Griffith in the course of experiments on the bacterium, Streptococcus pneumoniae in 1928. This bacterium, which causes pneumonia in humans, is normally lethal in mice. During the course of his experiment, a living organism (bacteria) had changed in physical form.

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