What technique is used to amplify portions of DNA, usually about 500 base pairs in size?

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Polymerase chain reaction (PCR) is a technique used to amplify specific portions of DNA, usually about 500 base pairs in size. This technique uses a thermostable DNA polymerase enzyme and a set of primers that are complementary to the sequences flanking the region of interest. The DNA is denatured, the primers anneal to the complementary sequences, and the polymerase extends the primers to create a new copy of the DNA fragment. This process is repeated many times, resulting in the exponential amplification of the targeted DNA fragment.

What Technique Is Used to Amplify Portions of DNA, Usually