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  4. The procedure through which a piece of DNA is introduced in a host bacterium is

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Q. The procedure through which a piece of DNA is introduced in a host bacterium is

NTA AbhyasNTA Abhyas 2020Molecular Basis of Inheritance

Solution:

DNA cannot pass through cell membrane as it is a hydrophilic molecule. The bacterial cell is made competent to take up DNA by treating them with a cation like calcium. This increases the efficiency of the DNA entering the bacterial cell through pores in its cell wall. This process through which a piece of DNA is introduced into the host bacteria is called transformation.