扫描二维码，直接登录
题库 / GMATLA-CR-8
Telomerase is an enzyme that is produced only in cells that are actively dividing. For this reason it is generally absent from body tissues in adults. Bone marrow is an exception to this rule, however, since even in adults, bone marrow cells continually divide to replace old blood cells. Cancers are another exception, because their cells are rapidly dividing.
The information provided most strongly supports which of the following?
Telomerase is the only enzyme that is present in cancerous cells but absent from cells that are not actively dividing.
In children, the only body tissues from which telomerase is absent are those in which cells are not rapidly dividing.
The presence of telomerase in bone marrow is no indication of bone marrow cancer.
Cancer of the bone marrow develops more rapidly than cancer growing in any other kind of adult tissue.
The level of telomerase production is always higher in cancerous tissue than in noncancerous tissue.
题目： T出现在骨髓和癌细胞中。
问：依据描述能得出什么结论。
A T是唯一的酶....， the only没说
B T是唯一不出现在哪里的酶, the only body tissues，没说
C 骨髓细胞里边出现T不一定就是得了骨髓癌。对的
D 骨髓癌比其他组织癌发展得快，没说
E T酶在癌组织中的产生速度要比非癌组织里要快，说不定骨髓细胞里边的level更高呢
登录 或 注册 后可以参加讨论