Word: nucleic
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Dates: during 1990-1999
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...member of the Human Genome Organization,Singer Headed as a section on nucleic acidenzymology at the National Cancer Institute until1979, when she became the chief of the Laboratoryof Biochemistry there...
...procedure is much easier than traditional gene therapy, since it does not require researchers to determine the nucleic acid sequence of the target cell in order to affect it with the altered gene...
This year, the MBC expanded its annual meeting at the World Trade Center to a two-day conference of biotechnology business seminars, a science symposium focusing on drug design and nucleic acid-based therapy and a trade exposition by over 150 companies featuring the latest in biotechnology and related products...
...formidable enough opponent, mainly because researchers still don't understand the method to its madness. Like all viruses, HIV is simply a strand of genetic material (in this case the nucleic acid RNA) surrounded by a protein coat. A virus lacks the tools to reproduce unless it invades a living cell and takes over the host's molecular machinery. The intruder can then produce many copies of itself, eventually killing the cell. One of HIV's favorite targets is the CD4 T-cell, an important player in the human immune system...
...these things alive? That depends on how the term is defined. Surprisingly, there is no clear definition of "life." Most of the criteria put forward in the past are anthropocentric. Life on earth is carbon-based and built around the nucleic acids RNA and DNA, but that may be a historical accident. Most living things metabolize and multiply, but not all. Viruses have no metabolisms of their own; mules cannot reproduce. Many living things grow, but so do clouds and garbage dumps...