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What is the purpose of lysis buffer in DNA isolation?

Answer and explanation

Correct answer: It opens cells and releases DNA

The governing concept is cell lysis: DNA is enclosed within cells, and the first practical step in extraction is to disrupt the cell membrane and, when present, the nuclear membrane. A lysis buffer usually provides a suitable pH and salt environment and may contain detergents that dissolve membrane lipids. It may also include agents that help protect DNA from nucleases. Thus option A is correct because the buffer makes cellular contents, including DNA, accessible for later purification. Option B is wrong because DNA is not converted into peptide. Options C and D are unrelated to the function of a lysis buffer. The exact composition varies with the organism and extraction method.

Related tags

Lysis BufferCell DisruptionDna IsolationIsolation Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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