Which divalent cations are usually used to make competent cells?(a) Carbon(b) Nitrogen(c) Copper(d) CalciumI have been asked this question during an internship interview.Query is from Tools of Recombinant DNA Technology: Competent Host topic in division Biotechnology Principles and Processes of Biology – Class 12

Which divalent cations are usually used to make competent cells?(a) Ca

1.	Which divalent cations are usually used to make competent cells?(a) Carbon(b) Nitrogen(c) Copper(d) CalciumI have been asked this question during an internship interview.Query is from Tools of Recombinant DNA Technology: Competent Host topic in division Biotechnology Principles and Processes of Biology – Class 12
Answer» Right option is (d) Calcium To elaborate: The DIVALENT cations of calcium are used to make cells COMPETENT. Calcium is used in the form of a salt of calcium CHLORIDE. It increases the EFFICIENCY of the bacterial membrane to allow the passage of FOREIGN DNA.

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