Why use a negative control when running gel electrophoresis? if a band shows up in this lane, what does it tell you about your pcr products?

Question: Why use a negative control when running gel electrophoresis? if a band shows up in this lane, what does it tell you about your pcr products?

A negative control is used in gel electrophoresis to detect any contamination that may have occurred during the PCR process. If a band shows up in the negative control lane, it indicates that there was some sort of contamination in the PCR products.

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