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16 May, 08:33

what would be the first step in using PCR to copy a gene?

A. Various strands of DNA are allowed to cool

B. DNA is heated to separate strands

C. DNA polymerase adds nucleotides to separate strands.

D. Copied strands are used as templates to make more copies.

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Answers (2)
  1. 16 May, 09:53
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    B. DNA is heated to separate strands

    First. PCR reaction
  2. 16 May, 12:21
    0
    B. DNA is heated to separate strands

    This is always the first step in a PCR reaction, the Heat acts as Helicase to unwind the double helix.
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