题目

In 1949 my father came back from the war(战争)，like many other soldiers．     Soon after he came back，my grandmother became very ill．The doctors said that she needed a blood transfusion(输血)at once，or she would not live through(活过)the night．The problem was that Grandmother’s blood type(血型)was AB-，a very strange type．Even today, (1)it was hard to get some because there were no blood banks or flights to transport(运输)blood．None of the family members were that type．My grandmother was dying．     (2)My father left the hospital in tears to gather(聚集)a在生物体内性状的表达一般遵循DNA→RNA→蛋白质的表达原则,下面有关这个过程的说法不正确的是 A．在细胞的一生中,DNA一般是不变的,RNA和蛋白质分子是变化的 B．DNA→RNA主要是在细胞核中完成的,RNA→蛋白质是在细胞质中完成的 C．RNA是蛋白质翻译的直接模板,DNA是最终决定蛋白质结构的遗传物质 D．DNA→RNA会发生碱基互补配对过程,RNA→蛋白质不会发生碱基互补配对过程