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What is useful to record in a laboratory notebook during DNA isolation?

Answer and explanation

Correct answer: Sample source, method, yield, and purity

The governing concept is scientific traceability and reproducibility. A laboratory notebook should preserve the information needed to understand, repeat, compare, and troubleshoot an experiment. Recording the sample source and identity establishes traceability. Recording the extraction method, reagent lots or changes, dates, timings, and deviations explains how the work was performed. Yield and purity measurements allow the result to be evaluated and compared with another preparation. Therefore option B is correct. Taste and smell are not reliable scientific measurements, and tube color alone cannot identify a sample or reproduce a protocol. Complete records also help reveal procedural errors and support responsible interpretation.

Related tags

Laboratory NotebookDna IsolationExperimental RecordsIsolation Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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