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17 January, 12:32

PCR is a technique that: Select one: a. can produce many exact copies of segments of DNA b. virtually eliminates operator error from DNA analysis c. provides a statistical analysis of the nitrogenous-base pairings d. produces information regarding the sequence of nitrogenous bases e. all of the above

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  1. 17 January, 16:09
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    a. can produce many exact copies of segments of DNA

    Explanation:

    PCR refers to polymerase chain reaction that replicates a gene or a DNA segment into multiple copies. For the purpose, primers, the sample DNA template to be amplified, nucleotide monomers and the heat-tolerant DNA polymerase enzyme (Taq polymerase) are mixed.

    The heating of the mixture leads to the denaturation of the sample DNA. The mixture is cooled down to allow annealing of the primers to the DNA template which is then amplified by the enzyme Taq DNA polymerase. The reaction mixture is heated to allow denaturation of all the DNA molecules which in turn serve as a template and the process is repeated for several rounds according to the requirement of the copies of the sample DNA.
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