Medicine Award Kicks off Nobel Prize Announcements Two scientists who have won praise for research into the growth of cancer

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问题               Medicine Award Kicks off Nobel Prize Announcements
    Two scientists who have won praise for research into the growth of cancer cells could be candidates for the Nobel Prize in medicine when the 2008 winners are presented on Monday, kicking off six days of Nobel announcements.
    Australian-born US citizen Elizabeth Blackburn and American Carol Greider have already won a series of medical honors for their enzyme(酶|)research and experts say they could be among the front-runners for a Nobel.
    Among the pair’ s possible rivals are Frenchman Pierre Chambon and Americans Ronald Evans and Elwood Jensen, who opened up the field of studying proteins called nuclear hormone receptors
    As usual, the tight-lipped award committee is giving no hints about who is in the running before presenting its decision in a news conference at Stockholm’ s Karolinska Institute.
    Alfred Nobel, the Swede who invented dynamite(炸药),established the prizes in his will in the categories of medicine,physics,chemistry,literature and peace. The economics prize is technically not a Nobel but a 1968 creation of Sweden’ s central bank.
    Nobel left few instructions on how to select winners,but medicine winners are typically awarded for a specific breakthrough rather than a body of research.
    Hans Jornvall, secretary of the medicine prize committee, said the 10 million kronor(瑞典克朗)(US $ 1.3 million)prize encourages groundbreaking research but he did not think winning it was the primary goal for scientists.
    " Individual researchers probably don’ t look at themselves as potential Nobel Prize winners when they’ re at work, "Jornvall told The Associated Press. "They get their kicks from their research and their interest in how life functions. "
    In 2006, Blackburn, of the University of California, San Francisco, and Greider, of Johns Hopkins University in Baltimore, shared the Lasker prize for basic medical research with Jack Szos-tak of Harvard Medical School. Their work set the stage for research suggesting that cancer cells use telomerase(端粒酶)to sustain(维持)their uncontrolled growth.
Telomerase may play a key role in______.

选项 A、the unchecked growth of cancer cells
B、the killing of cancer cells
C、the division of normal cells
D、the transmission of viruses

答案A

解析 文章末尾讲到,他们的工作为研究癌细胞利用端粒酶维持不可控制的生长打下了基础。由此可见,端粒酶对癌细胞的无限增殖起到重要作用。故选A。
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