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When may changing gloves be necessary in DNA isolation?

Answer and explanation

Correct answer: To avoid contamination while handling different samples

Gloves protect both the worker and the sample, but they can themselves become contaminated during handling. When moving from one sample to another, touching contaminated surfaces, or dealing with spilled material, gloves may carry DNA, nucleases, salts, chemicals, or microorganisms into a new tube. Changing gloves, together with clean pipetting and separate work areas, reduces cross-contamination and protects the integrity of the isolated DNA. Option A is correct because different samples must be kept separate for reliable identification and downstream analysis. Gloves do not convert DNA into protein, heat samples, or transform water into RNA; those distractors do not describe the purpose of glove changes.

Related tags

Glove ChangingContaminationNuclease SafetyIsolation Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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