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

    What is PCR? Polymerase chain reaction (PCR) is a common laboratory technique used to make many copies (millions or billions!) of a particular region of DNA. This DNA region can be anything the …

  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. Gel electrophoresis (video) | Biotechnology | Khan Academy

    Since the DNA samples from vial 3 have three different lengths, does that mean three different target sequences were replicated when PCR was done and all three were later put into vial 3?

  4. Gel electrophoresis (article) | Khan Academy

    For your first question: You will do PCR of the entire sample. Then a restriction enzyme is used to cut the part you want. One restriction enzyme will make the cut on the same place in all samples. So you …

  5. 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 …

  6. Restriction enzymes & DNA ligase (article) | Khan Academy

    Restriction enzymes are DNA-cutting enzymes. Each enzyme recognizes one or a few target sequences and cuts DNA at or near those sequences.

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

    Because of these possibilities, it's important to collect plasmid DNA from each colony and check to see if it matches the plasmid we were trying to build. Restriction digests, PCR, and DNA sequencing are …

  8. 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 …

  9. Molecular mechanism of DNA replication - Khan Academy

    In the polymerization reaction mentioned in the section,"DNA Polymerase", shouldn't the diagram be showing a nucleoSIDE triphosphate instead of a nucleotide triphosphate?

  10. ATP cycle and reaction coupling | Energy (article) | Khan Academy

    ATP structure, ATP hydrolysis to ADP, and reaction coupling.