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  1. Polymerase chain reaction (PCR) (article) | Khan Academy

    Using PCR, a DNA sequence can be amplified millions or billions of times, producing enough DNA copies to be analyzed using other techniques. For instance, the DNA may be visualized by gel …

  2. Polymerase chain reaction (PCR) (video) | Khan Academy

    PCR (Polymerase Chain Reaction) is a vital technique in molecular biology, enabling researchers to amplify specific DNA fragments exponentially. Essential for cloning, forensics, and medical …

  3. DNA sequencing (video) | Biotechnology | Khan Academy

    DNA sequencing involves three main steps: 1) using PCR to amplify DNA fragments, 2) introducing dideoxynucleotides that halt DNA strand elongation, and 3) employing a computer to analyze the …

  4. Polymerase chain reaction (PCR) (article) | Khan Academy

    ok, I've got that PCR consists in basic of 3 steps - Denaturation (96C)-Annealing (55-65C)-Extention (72C). "This cycle repeats 2 - 35 times in a typical PCR reaction, which generally takes 2 - 4 hours, …

  5. Polymerase chain reaction (practice) | Khan Academy

    The denaturation step of the polymerase chain reaction (PCR) involves heating the reaction mixture to 95 ° C . Why does this step involve such a high temperature?

  6. Molecular mechanism of DNA replication - Khan Academy

    PCR, polymerases & amplification technology products https://www.neb.com/products/pcr-polymerases-and-amplification-technologies/pcr-polymerases-and-amplification-technologies/dna-polymerase …

  7. DNA sequencing (article) | Biotechnology | Khan Academy

    Although genomes are now typically sequenced using other methods that are faster and less expensive, Sanger sequencing is still in wide use for the sequencing of individual pieces of DNA, such as …

  8. Bacterial transformation & selection (article) | Khan Academy

    After a ligation, the next step is to transfer the DNA into bacteria in a process called transformation. Then, we can use antibiotic selection and DNA analysis methods to identify bacteria that contain the …

  9. Overview: DNA cloning (article) | Khan Academy

    That’s because, during a ligation, DNA fragments don’t always get “pasted” in exactly the way we intend. Instead, we must collect DNA from several colonies and see whether each one contain the right …

  10. Gene expression and regulation | AP®︎/College Biology | Khan …

    Examine key tools such as polymerase chain reaction (PCR), gel electrophoresis, and DNA sequencing. Discover how these methods advance research, medicine, and biotechnology applications.