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  1. Molecular mechanism of DNA replication - Khan Academy

    New DNA is made by enzymes called DNA polymerases, which require a template and a primer (starter) and synthesize DNA in the 5' to 3' direction. During DNA replication, one new strand …

  2. DNA structure and replication review (article) | Khan Academy

    DNA replication occurs through the help of several enzymes. These enzymes "unzip" DNA molecules by breaking the hydrogen bonds that hold the two strands together.

  3. Mode of DNA replication: Meselson-Stahl experiment

    There were three basic models for DNA replication that had been proposed by the scientific community after the discovery of DNA's structure. These models are illustrated in the diagram …

  4. Leading and lagging strands in DNA replication - Khan Academy

    DNA replication is a precise process where DNA unwinds and splits into two strands. Each strand then serves as a template for a new DNA molecule. The leading strand is built continuously, …

  5. DNA replication (article) | Khan Academy

    During DNA replication, the two strands of the DNA double helix are unwound and separated by enzymes. Each strand then serves as a template, or guide, for synthesizing a new, …

  6. DNA structure and replication (practice) | Khan Academy

    In a sample of double-stranded DNA, 30 % of the nitrogenous bases are adenine (A). What percentage of the nitrogenous bases in the sample are thymine (T)?

  7. Stages of transcription: initiation, elongation & termination (article ...

    The picture below shows DNA being transcribed by many RNA polymerases at the same time, each with an RNA "tail" trailing behind it. The polymerases near the start of the gene have …

  8. Telomeres and telomerase (article) | Khan Academy

    When DNA is being copied, one of the two new strands of DNA at a replication fork is made continuously and is called the leading strand. The other strand is produced in many small …

  9. Replication (practice) | Khan Academy

    In which of the following diagrams of DNA replication are the enzymes correctly labeled?

  10. DNA as the genetic material | Biology archive - Khan Academy

    DNA replication Learn DNA replication and RNA transcription and translation Leading and lagging strands in DNA replication