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Why can a desalting column be useful in restriction digestion?

Answer and explanation

Correct answer: To remove salts and exchange buffer

The governing concept is purification and buffer compatibility before a downstream enzymatic reaction. A desalting column can retain or separate unwanted small solutes, such as excess salts, while allowing the DNA-containing fraction to be recovered in a more suitable buffer. Removing inhibitory salt or exchanging into a compatible composition can improve the performance of a subsequent restriction-digestion or related enzyme reaction. Thus option A is correct. The column does not translate DNA into protein, methylate the enzyme as a routine function, or run an electrophoresis gel. The precise retention mechanism depends on the column type, so the manufacturer’s instructions and the expected DNA recovery should be considered when selecting and using it.

Related tags

Desalting ColumnBuffer ExchangeSalt RemovalCutting Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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