Telomerase is an enzyme that is produced only in cells that are actively dividing. Thus, as a rule, it is not present in adult tissue. 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.
Telomerase (Telo) produced in cells that actively divide. Therefore, Telo is not present in adult tissue. That means adult tissues do not actively divide. But there is an exception - bone marrow, which still divides continually in adults. Telo is probably present in bone marrow. Another exception is a cancerous cell which rapidly divides. This is irrespective of an adult or non adult. Telo probably is produced in cancerous cells too.
The information provided most strongly supports which of the following?
A. Telomerase is the only enzyme that is present in cancerous cells but absent from cells that are not actively dividing.
The "only" is a problem here. We can deduce that Telomerase is an enzyme that "could be" present in cancerous cells, but not the fact that it is the "only" one.B. Embryonic tissue is less likely to become cancerous than tissue that has ceased to actively divide.
No reference of this in the argument. Irrelevant.C. The presence of telomerase in bone marrow is no indication of bone marrow cancer.
Looks like a good candidate. I kept it aside. Then came back after eliminating other choices. Makes sense. Telo is probably produced in bone marrow just because bone marrow divides actively and not necessarily because of bone marrow cancer. Correct! D. Cancer of the bone marrow develops more rapidly than cancer growing in any other kind of adult tissue.
No reference of this in the argument. Irrelevant.E. The level of telomerase production is always higher in cancerous tissue than in noncancerous tissue.
No reference of this in the argument. Irrelevant.Please review my reasoning. Thank You in advance.
KarishmaB MartyMurray GMATGuruNY GMATNinjaTwo GMATNinja