News Main Animals Archaeology Dinosaurs Earth History Human Animal Space Tech   Getty Images |   RNA's Simple Structure As organic molecules go, RNA is pretty simple. An RNA strand is shown at bottom, in blue. The top red strand is DNA. RNA is like a piece of string dyed in four different colors. Each color corresponds to one of four nucleotides. Other molecules inside a cell read the colors on the RNA and use that information to build other molecules called proteins. | WATCH VIDEO: Imagine playing a video game only by using your brain...   « back to article

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