NEET Biology question

In order to induce the bacterial uptake of plasmids, the bacteria are made 'competent' by first treating with **[NEET 2007]**

(A)Sodium chloride
(B)Potassium chloride
(C)Magnesium chloride
(D)Calcium chlorideCorrect

Answer: (D)

Solution

In the classic transformation protocol, bacterial cells are incubated on ice in a solution of calcium chloride (CaCl2), which neutralises the negative charges on both the cell envelope and the incoming DNA, allowing the DNA to adhere to the cell surface before a brief

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Question ID VK-125326