<P> At about the same time, 22 nt long RNAs, now called microRNAs, were found to have a role in the development of C. elegans . Studies on RNA interference gleaned a Nobel Prize for Andrew Fire and Craig Mello in 2006, and another Nobel was awarded for studies on the transcription of RNA to Roger Kornberg in the same year . The discovery of gene regulatory RNAs has led to attempts to develop drugs made of RNA, such as siRNA, to silence genes . </P> <P> In March 2015, complex DNA and RNA nucleotides, including uracil, cytosine and thymine, were reportedly formed in the laboratory under outer space conditions, using starter chemicals, such as pyrimidine, an organic compound commonly found in meteorites . Pyrimidine, like polycyclic aromatic hydrocarbons (PAHs), is one of the most carbon - rich compounds found in the Universe and may have been formed in red giants or in interstellar dust and gas clouds . </P>

Where is the rna located in a eukaryotic cell