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

    How the sequence of nucleotide bases (As, Ts, Cs, and Gs) in a piece of DNA is determined.

  2. Sequences intro | Algebra (video) | Khan Academy

    For example, 2,5,8 follows the pattern "add 3," and now we can continue the sequence. Sequences can have formulas that tell us how to find any term in the sequence.

  3. 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 …

  4. The genetic code & codon table (article) | Khan Academy

    To crack the genetic code, researchers needed to figure out how sequences of nucleotides in a DNA or RNA molecule could encode the sequence of amino acids in a polypeptide.

  5. Intro to biotechnology (article) | Khan Academy

    DNA sequencing involves determining the sequence of nucleotide bases (As, Ts, Cs, and Gs) in a DNA molecule. In some cases, just one piece of DNA is sequenced at a time, while in other cases, a large …

  6. DNA questions (practice) - Khan Academy

    The leading strand of a DNA molecule has the following sequence: 5’-CGCATGTAGCGA-3’ Which of the following sequences is complementary to the leading strand shown above?

  7. Food chains & food webs (article) | Ecology | Khan Academy

    How food chains and food webs represent the flow of energy and matter. Trophic levels and efficiency of energy transfer.

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  9. Telomeres and telomerase (article) | Khan Academy

    The enzyme binds to a special RNA molecule that contains a sequence complementary to the telomeric repeat. It extends (adds nucleotides to) the overhanging strand of the telomere DNA using this …

  10. Mesh current method (article) | Khan Academy

    As with any circuit analysis challenge, we have to solve a system of 2 E independent equations, where E is the number of circuit elements. The Mesh Current Method efficiently manages the analysis task, …