Transformation experiments were first performed over the bacterium
A
Escherichia coli
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B
Salmonella typhimurium
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C
Diplococcus pneumoniae
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D
Pasteurella pestis
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Solution
The correct option is BSalmonella typhimurium Transformation is one of the process of horizontal gene transfer technique. It is a process in which DNA segment of a dead relative is directly taken up and incorporated through the cell membrane into a living cell. The DNA segment is later replaced with homologous section of cell's DNA. This process was first performed over the bacterium Salmonella typhimurium.
Thus, the correct answer is 'Salmonella typhimurium.'