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 rapaidly dividing. A. Telomerase is the only enzyme that is present in cancerous cells but absent from cells that are not activly dividing. B. in children, the only body tissues from which telomerase is absent are those ins which cells are not rapidly dividing. C. The presence of telomerase in bon marrow is no indication of bone marrow cancer. D. Cancer of the bone marrow develops more rapidly than cancer growing in any other kind of adult tissue. E. The level of telomerase production is always higher in cancerous tissue than in noncancerous tissue. the information provided most strongly supports which if the following? the answer is C 不懂....? why not E? 题目说的不是 Telomerase 只存在於分裂活跃的细胞中 因为这个原因 所以很少产生在成人体内 但是bone marrow 与 Cancer 是例外 存在於bone marrow 是因为bone marrow cell 不断分裂以替代老的红血球细胞 cancer 是因为他们的细胞快速在分裂 所以 C ?... --

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