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OCR: Studies of ribosomes often called the protein factories of cells have provided support for another important part of the RNA -world hypothesis the proposition that RNA could have created protein synthesis Ribosomes which consist of ribosomal RNA and protein, travel along strands of messenger RNA (single -strand transcripts of protein- -coding genes carried by DNA) As the ribosomes move they link one specified amino acid to the next by forming peptide bonds between them Harry F Noller, Jr. of the University of California at Santa Cruz has found that it is probably the RNA in ribosomes, not the protein that catalvzes formation of the peptide bonds Other work indicates that primitive RNA would have been able to evolve as would be required of any material that gave rise to the genes in life's ...