Chemical Makeup of DNA

IWe hear about DNA all the time, from crime shows to genealogy services, but what is it?  It’s the building block of all life.  The slight differences in the arrangement of the four base molecules can mean the difference between an organism being a tree or a walrus, or a human.  Today’s infographic explains in detail just how this interesting double helix polymer is built, what holds it together, and how it acts to make all life what it is. [VIA]

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