Achtung:
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Source
Astro Sweden
Last updated
about 19 hours ago
Description
Note:
The item is located abroad. Please note that delivery conditions, shipping times, and/or the purchase process may differ.
Här är en recension från en amerikansk lärare: "I have used a number of different DNA models to teach DNA structure; this one is the best. In other molecular models, any bond can be taken apart, but that is inconvenient. The only bonds that you want to take apart in DNA are the hydrogen bonds for base pairing and the phosphodiester bonds in the sugar-phosphate backbone. In this model, bases and the deoxyribose are cast as a single plastic unit. Base pairing is magnetic. If you try to pair bases in a parallel, rather than antiparallel fashion, the magnets won't let you (great!). The phosphates snap into place for one bond and use magnets for the other, so no getting that wrong either. The assembled model on the stand easily shows the major and minor groove, and it's easy to start taking it apart to show base pairing and the phosophodiester backbone. It's also easily portable. This kit is perfect for hands-on exploration of DNA structure." Här kan du se och höra James Watson själv berätta om sitt arbete med att kartlägga strukturen hos DNA.
Artikelattribut Exkludera från marknadsföring Ja Varumärke Alega Lagerprofil 4
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