Word: rna
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...study says feline leukemia virus is the only tumor-producing "RNA virus known to be widely disseminated in man's environment...
...RNA is a material which normally transcribes the genetic code on DNA, but in some viruses RNA takes the place...
Chase then tried to deliver a paper about his research with "RNA replication" and its link to cancer. But Chase ended his speech abruptly and apologized. "I thought this was the Med School thing," he said...
...England, was led by Nobel Laureate Francis Crick, who with James Watson determined the structure of life's master molecule, DNA. His co-workers were Sydney Brenner, who discovered the "start" and "stop" signals in the genetic code; Aaron Klug, who first determined the crystalline structure of transfer RNA (tRNA), the molecule that brings amino acids to the ribosome for assembly into protein; and George Pieczenik, 32, a biochemist now at Rutgers University in New Brunswick...
...message are arranged. These patterns could have arisen, they found, if primitive tRNA molecules each had five nucleotides interacting with the genetic message instead of the three that now do. With five nucleotides, tRNA molecules-each lugging along its distinctive amino acid-could link up firmly with a messenger RNA molecule (which brings the genetic instructions from the DNA molecule). The amino acids could thus be assembled into the appropriate protein without the aid of a ribosome. Contemporary tRNA molecules, unaided, cannot form a stable linkage with messenger RNA; a ribosome is needed to hold them in place until their...