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.
问题是：以上信息支持以下哪一项。这不是加强题。
A: 不一定，癌细胞可能有其他酶，在不可分裂细胞中也没有
B: 全文没有提孩子
C: 是的，因为骨髓中也有端粒酶
D: 骨髓癌发展比其他组织癌症发展迅速不一定是因为骨髓中有端粒酶导致的
E: 酶的生产速率，没有提到
登录 或 注册 后可以参加讨论