Word: rna
(lookup in dictionary)
(lookup stats)
Dates: during 1970-1979
Sort By: most recent first
(reverse)
...have been known to scientists for years. But it took the efforts of a team led by Geneticist Carl Woese of the University of Illinois in Urbana to demonstrate that the archaebacteria had an extraordinary characteristic. Using enzymes, or chemical catalysts, they broke down and then analyzed the RNA in the archaebacteria's ribosomes, the structures that "read" the message of the master molecule DNA and produce the protein necessary for life. They found that the RNA molecular sequences were distinctly different from those of other bacteria and of plants and animals...
...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...
...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...