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单词	polymerase chain reaction
释义	polymerase chain reaction noun : an in vitro technique for rapidly synthesizing large quantities of a given DNA segment that involves separating the DNA into its two complementary strands, using DNA polymerase to synthesize two-stranded DNA from each single strand, and repeating the process —abbreviation PCR Example Sentences Recent Examples on the Web Home antigen tests are quick and inexpensive but less sensitive than polymerase chain reaction or PCR tests, which are usually performed in a lab. Ken Alltucker, USA TODAY, 12 Aug. 2022 The tests can be polymerase chain reaction, or PCR, tests performed every other day or less-sensitive antigen tests performed every day. Andy Davis, Arkansas Online, 27 Oct. 2021 Then the swabbed samples undergo a PCR—or polymerase chain reaction—test, which involves extracting genetic material and amplifying it to look for the presence of monkeypox virus’s DNA. Wired, 3 Aug. 2022 Results often were provided within 19 hours, Webber said, which is much faster than many PCR — polymerase chain reaction — screening tests in the city. Laura Garcia, San Antonio Express-News, 17 Sep. 2021 Most laboratories generate their COVID-19 test results through a molecular testing process called reverse polymerase chain reaction, or RT-PCR, that has been used for years to diagnose a variety of diseases. Alexander Tin, CBS News, 7 Jan. 2022 This is done using a technique called a polymerase chain reaction. Helena Oliviero, ajc, 4 Dec. 2021 This is done using a technique called a polymerase chain reaction. Nathaniel Hafer, The Conversation, 8 Nov. 2021 Labcorp's test is a PCR, or polymerase chain reaction test. Berkeley Lovelace Jr., NBC News, 17 May 2022 See More Word History First Known Use 1985, in the meaning defined above Medical Definition polymerase chain reaction noun : an in vitro technique for rapidly synthesizing large quantities of a given DNA segment that involves separating the DNA into its two complementary strands, binding a primer to each single strand at the end of the given DNA segment where synthesis will start, using DNA polymerase to synthesize two-stranded DNA from each single strand, and repeating the process —abbreviation PCR
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