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  • Teacher Guides

    Teacher Guides

    Collection

    Designed by educators, BioInteractive’s teacher guides will help you select BioInteractive resources aligned to specific topics and standards, including the AP® Biology Curriculum Framework.

  • Single Molecules on the Move

    Single Molecules on the Move

    Image of the Week

    Using super-resolution microscopes, scientists have uncovered how single protein molecules behave, and the results are astonishing.

  • Seeing Single Molecules Move

    Seeing Single Molecules Move

    Animation

    (1 min 40 sec) Single-molecule analysis using super-resolution microscopes reveals that transcription factors are not usually found bound to their binding sites on DNA.

  • Teacher Guide: Gene Regulation

    Teacher Guide: Gene Regulation

    Teacher Guide

    Topics include: Gene regulation mechanisms and examples, gene regulation and human disease, and RNA interference.

  • Regulation of the Lactase Gene

    Regulation of the Lactase Gene

    Click & Learn

    Lactase persistence results from a mutation that changes how transcription factors interact, thereby affecting gene expression.

  • Recent Adaptations in Humans

    Recent Adaptations in Humans

    Click & Learn

    Lactose tolerance, sickle cell anemia, and bitter taste perception are three examples of recently evolved human traits.

  • Genetics of Human Origins and Adaptation

    Genetics of Human Origins and Adaptation

    Lecture

    (58 min 31 sec) Genetic evidence shows that humans evolved in Africa and continue to evolve.

  • Regulation of Eukaryotic DNA Transcription

    Regulation of Eukaryotic DNA Transcription

    Animation

    (2 min 5 sec) General transcription factors, activators, and repressors interact to regulate the transcription of eukaryotic DNA into RNA.

  • MECP2

    MECP2

    Animation

    (43 sec) This animation shows how the protein MECP2, in conjuction with another protein complex, can act as an "on-off' switch for gene expression.