Word: nucleus
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...second letter, they described that mechanism: how the DNA molecule unwinds and unzips itself right down the middle during cell division, its base pairs breaking apart at their hydrogen bonds. Then by drawing on the free-floating material surrounding them in the nucleus of the cell, the two separated strands link up with complementary base-and-strand units along their entire length, forming two exact copies of the original double helix. Thus DNA faithfully passes its genetic information on to new cells and to future generations...
...cells of the eye, for example, differ from those of the kidneys or muscles. Despite their variety, however, all proteins are built from some of only 20 smaller and simpler molecules, called amino acids. How then, scientists asked themselves, did the isolated double helix, locked in the nucleus of the cell, direct the assembly of amino acids into protein in other parts of the cell...
Scientists suspected that DNA had a helper, a single-stranded chemical first cousin called ribonucleic acid (RNA). Most of the cell's RNA is found in ribosomes. These are globular bodies in the material outside the cell's nucleus that seem to be highly active centers of protein synthesis. But if this ribosomal RNA played a role in protein making, how did it obtain and execute the instructions from the master molecule DNA inside the nucleus...
...nucleus of last year's boat is still intact with second year captain Dave Harman at stroke, Dick Moore, Chuck Hewitt, Jim Richardson, Tony Brocks, Phin Sprague and cox Fred Yalouris. The only newcomers are sophomores Andy Narva and Ephram King...
...incident, but it usually has some special significance. It may be a minor vignette or a brief comment on a major event; it may underscore the important or puncture the absurd. "The ideal item," says Nation Editor Jason McManus, "contains a moral, or a quality of fable, or the nucleus of some atom of the national mood...