File:Rna.gif

Summary
RNA - A chemical similar to a single strand of DNA. In RNA, the letter U, which stands for uracil, is substituted for T in the genetic code. RNA delivers DNA's genetic message to the cytoplasm of a cell where proteins are made.

Copyright status
"All of the illustrations in the Talking Glossary of Genetics are freely available and may be used without special permission."

Source
Human Genome Project Research Institute

http://www.genome.gov/Pages/Hyperion/DIR/VIP/Glossary/Illustration/rna.cfm?key=ribonucleic%20acid%20%28RNA%29