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  • Function Groups: Amino and Carbonyl

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    Carbonyl groups, which consist of an oxygen double bonded to a carbon in the middle of a hydrocarbon chain, are polar. Amino groups, which consist of two hydrogens attached to a nitrogen, are able to accept H positive ions from solution, forming H subscript 3 baseline positive. Amino groups are considered basic.

    Figure 2.27 (OpenStax, Biology 2e) caption: These functional groups are in many different biological molecules. R, also known as R-group, is an abbreviation for any group in which a carbon or hydrogen atom is attached to the rest of the molecule.

    (Source: OpenStax)

  • Double helix strand of DNA with protein pairs on each step. For example, AT and CG. For each pair, one letter is smaller than the other. Caption: one large, and one small--

    In the early 1950s, American biologist James Watson and British physicist Francis Crick came up with their famous model of the DNA double helix. The structure of DNA, as represented in Watson and Crick's model, is a double-stranded helix. The sugar-phosphate backbones of the DNA strands make up the outside of the helix, while the nitrogenous bases are found on the inside and form hydrogen-bonded pairs that hold the DNA strands together. Other topics covered include DNA replication, RNA transcription, and RNA translation. Part of the "Biology" series.

    (Source: DCMP)

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  • Chemistry

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    • Simulation

    A collection of Chemistry related resources

    A collection containing 67 resources, curated by Benetech

  • Elements

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    3D models and images of the entire periodic table of elements

    A collection containing 118 resources, curated by Library Lyna

  • Biology

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    Biology related concepts

    A collection containing 59 resources, curated by Benetech