(Solved): Which of the following are experimental errors (technical mistakes) that could result in the failure ...

Which of the following are experimental errors (technical mistakes) that could result in the failure of the PCR reaction to generate a product or to generate a false PCR product? Choose all that apply. The DNA purification failed, so there was nothing available to amplify in the PCR reaction. The group failed to use fresh tips when setting up the PCR reactions and could have cross-contaminated the reactions with multiple individuals' DNA. There was too much Haelll in the reaction. Contaminants in the DNA extraction inhibited the polymerase.