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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.
B. 在孩子体内，T唯一不在的身体组织是没有在快速分裂的细胞。（T只存在于在快速分裂的细胞中）排除
理由：
原文：
Telomerase is an enzyme that is produced only in cells that are actively dividing
T酶只在actively dividing的细胞中产生
题目：
In children, the only body tissues from which telomerase is absent are those in which cells are not rapidly dividing.
T酶不在不是rapidly dividing的细胞中产生
否命题：无法判断是否正确。因为原文只是告诉T酶会生成的唯一条件，但是没有告诉T酶不会生成的其他所有情况。
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