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The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
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COVID-19 testing
Videos
COVID-19 testing involves analyzing samples to assess the current or past presence of SARS-CoV-2, the virus that causes COVID-19 and is responsible for the COVID-19 pandemic. The two main types of tes
The US CDC's COVID-19 laboratory test kit
The US CDC's COVID-19 laboratory test kit
Demonstration of a nasopharyngeal swab for COVID-19 testing
Demonstration of a nasopharyngeal swab for COVID-19 testing
Demonstration of a throat swab for COVID-19 testing
Demonstration of a throat swab for COVID-19 testing
A PCR machine
A PCR machine
Polymerase chain reaction
Videos
The polymerase chain reaction is a laboratory method widely used to amplify copies of specific DNA sequences rapidly, to enable detailed study. PCR was invented in 1983 by American biochemist Kary Mul
COVID-19 testing
…tests include CRISPR, isothermal nucleic acid amplification, digital polymerase chain reaction, microarray analysis, and next-generation sequencing. Polymerase chain reaction (PCR) is a process that amplifies (replicates) a small, well-defined segment of DNA many hundreds of thousands of times, creating enough of it for…
Placing a strip of eight PCR tubes into a thermal cycler
Placing a strip of eight PCR tubes into a thermal cycler
An older, three-temperature thermal cycler for PCR
An older, three-temperature thermal cycler for PCR
Ethidium bromide-stained PCR products after gel electrophoresis. Two sets of primers were used to amplify a target sequence from three different tissu
Ethidium bromide-stained PCR products after gel electrophoresis. Two sets of primers were used to amplify a target sequence from three different tissue samples. No amplification is present in sample #1; DNA bands in sample #2 and #3 indicate successful amplification of the target sequence. The gel also shows a positive control, and a DNA ladder containing DNA fragments of defined length for sizing the bands in the experimental PCRs.
DNA samples are often taken at crime scenes and analyzed by PCR.
DNA samples are often taken at crime scenes and analyzed by PCR.