【资格考试】2019最新整理--(备考辅导)考研英语阅读理解精读100篇unit48

——教学资料参考参考范本—— 【资格考试】2019最新整理--(备考辅导)考研英语阅读理解精读100篇unit48 ______年______月______日 ____________________部门 1 / 10 Unit 48 Scientists have known for more than two decades that cancer is a disease of the genes. Something scrambles the Dna inside a nucleus, and suddenly, instead of dividing in a measured fashion, a cell begins to copy itself furiously. Unlike an ordinary cell, it never stops. But describing the process isn't the same as figuring it out. Cancer cells are so radically different from normal ones that it's almost impossible to untangle the sequence of events that made them that way. So for years researchers have been attacking the problem by taking normal cells and trying to determine what changes will turn them cancerous——always without success. Until now. According to a report in the current issue of Nature, a team of scientists based at M.I.T.'s Whitehead Institute for Biomedical Research has finally managed to make human cells malignant——a feat they accomplished with two different cell types by inserting just three altered genes into their DNA. While these manipulations were done only in lab dishes and won't lead to any immediate treatment, they appear to be a crucial step in understanding the disease. This is a \ 2 / 10