Biology, 03.03.2021 09:00 nestergurl101

Under which of these conditions would scientists use the polymerase chain reaction(PCR) before they analyze a DNA sample A. The DNA sample comes from the bacterium or virus
B. The DNA sample has been cut into fragments by restriction enzymes
C. Only a small amount of the DNA sample is available
D. the DNA sample includes regions that are transcribed into mRNA

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