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Why is recording lane order necessary in a restriction digest gel?

Answer and explanation

Correct answer: To interpret band identity correctly

The direct answer is option A: lane order must be recorded so each band can be assigned to the correct sample. In a gel, DNA samples are loaded into separate lanes. A lane may contain a ladder, untreated control, digested sample, or another replicate. During electrophoresis and photography, the physical appearance of the gel does not by itself tell us which lane is which. A written lane map preserves that identity. Option A is correct because without it, a true band may be attributed to the wrong sample and the conclusion may be false. Option B is wrong: lane order does not make the gel brighter; staining and imaging conditions affect brightness. Option C is wrong because electrophoresis does not convert DNA into protein. Option D is wrong because lane documentation does not freeze an enzyme. Record the lane number, sample name, treatment, and marker position before loading, and keep the same orientation in the image. Memory cue: no lane map means no trustworthy band identity.

Related tags

Lane OrderGel DocumentationSample Identity

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