User:Dak/TRNA/simple
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Transfer RNA (tRNA) is a molecule made of RNA that plays a role in building protiens within cells.
The existance of tRNA was first hypothesysed by Francis Crick, as he (correctly) guessed that there must be a molecule, within cells, that can essentially 'grab' specific amino-acids (the building blocks of protiens), 'read' mRNA, and put the correct amino acid in place in the growing protien chain by lining up with the correct position on an mRNA.