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What is the effect of an underexposed gel image in restriction digest?

Answer and explanation

Correct answer: Faint bands can be missed

Direct answer: Option A, an underexposed gel image can cause faint DNA bands to be missed. Exposure controls how much signal the imaging system records. If exposure is too short or the signal is too weak, real low-intensity bands may look invisible, making the digest appear to have fewer fragments than it actually has. Proper imaging, while avoiding overexposure and background, is needed for reliable interpretation. Option A is correct. Option B is wrong because an image setting does not make DNA undergo more cutting; digestion happened earlier in the tube. Option C is wrong because underexposure does not chemically inactivate the enzyme. Option D is wrong because a gel does not become protein. The image problem affects observation, not the molecular reaction. Memory cue: underexposure hides bands; it does not remove DNA.

Related tags

Underexposed GelFaint BandsImaging

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