One problem associated with evolving a system in which RNA bases code for amino acids is that the correct bonding of amino acids to t-RNAs requires t-RNA synthetase catalysis - mature proteins are required to initiate synthesizing the first proteins.
RNA is Ribonucleic Acid. It is a single stranded nucleic acid with the nitrogenous bases adenine, guanine, cytosine and uracil. The sugar present in RNA is ribose sugar. It is required for the translation of genetic information into proteins.
t-RNA is the transfer RNA, also known as the adaptor molecule. It role can be found during translation where it acts as a mediator between the m-RNA and the newly forming polypeptide chain.
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