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What is a common first task in DNA isolation?

Answer and explanation

Correct answer: Taking a suitable biological sample

The governing concept is the initial sample-selection step in DNA isolation. Before cells are lysed and DNA is purified, an appropriate biological sample must be collected and identified. The sample should contain the target cells or tissue and should be handled in a way that limits contamination and degradation. Its quality directly affects the amount, purity, and integrity of the DNA obtained later. Therefore option B is correct. Protein staining is not the first essential extraction step, burning DNA destroys the target molecule, and making RNA produce light is unrelated to isolation. Correct sample collection provides the material on which all subsequent extraction steps depend.

Related tags

Dna IsolationSample CollectionBiological SampleIsolation Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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