This has been reposted from our lab tumblelog
DNA and RNA have similar structures in that each has a sugar-phosphate backbone with one organic base bound to each sugar. However, there are four differences between RNA and DNA:
- The sugar in RNA is ribose, not deoxyribose
- RNA uses uracil instead of thymine. The common bases in RNA are adenine, uracil, guanine, and cytosine.
- RNA is much smaller than DNA. The molecules of RNA range in molar mass between 20,000 and 40,000 g/mol instead of as much as 109 g/mol.
- RNA is usually single-stranded, not double-stranded
Images taken from wikipedia.org
via the Lab Tumblr: http://genefish.tumblr.com/post/44473467351