Word: nucleic
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...replication and protein synthesis. More recent discoveries in the field have clearly illuminated the basic biochemical manner in which genetic materials are replicated and translated inside living tissue. Chance and Necessity reviews this information, describing the molecular structures in a fairly non-technical fashion. Monod hypothesizes how the nucleic acids might have originated as the information carrier molecule, suggests that the genetic code may have come into being purely randomly, and even suggests a mechanism for DNA-protein specificity of translation that may have originated without an RNA intermediate...
Most researchers have long believed that viruses play some crucial role in causing human cancers. The source and precise function of these viruses (tiny packets of nucleic acids and protein) in cancer are still obscure, and no one knows how to control them. Dramatic progress cannot be made until cancer viruses are clearly identified in humans, as has already been done in animals. Now that vital next step has apparently been taken...
...diagram "Protein Synthesis," your artist showed the nucleic-acid fragment UGA as a "three-letter word" that "codes for one amino acid...
...found that they can increase the life span of laboratory animals by underfeeding them and thus delaying maturation. This phenomenon, they believe, occurs because a smaller intake of food results in the formation of fewer cross linkages?connecting rods that link together and partly immobilize the long protein and nucleic acid molecules essential to life. If scientists can retard cross linking in man, they may well slow his aging process. Scientists also hope that they can some day do away with disease, genetically breeding out hereditary defects while breeding in new immunities to bacterial and other externally caused ailments. Finally...
...really knows what causes cancer, which is actually more than 100 distinct diseases, all snaring two common characteristics: rapid cell growth and a terrifying tendency to spread from one part of the body to another. Most researchers agree, however, that the villain is a virus, a miniature packet of nucleic acid with a membranous coat that was shown as early as 1911 to cause tumors in animals...