5. In the experiment of cell fusion, when tumor cells were fused with normal cells, the subsequently arising cells lost the ability to form tumors. This observation can be explained as --. a. ras proto-oncogene was inactivated, resulting in no tumor formation b. the arising cancer cells shed or inactivated the tumor suppressor genes, hence cells did not form tumors. c. mitogenic growth factors were removed, hence cells did not proliferate uncontrollably.
5. In the experiment of cell fusion, when tumor cells were fused with normal cells, the subsequently arising cells lost the ability to form tumors. This observation can be explained as --. a. ras proto-oncogene was inactivated, resulting in no tumor formation b. the arising cancer cells shed or inactivated the tumor suppressor genes, hence cells did not form tumors. c. mitogenic growth factors were removed, hence cells did not proliferate uncontrollably.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:5. In the experiment of cell fusion, when tumor cells were fused with normal cells, the subsequently arising
cells lost the ability to form tumors. This observation can be explained as --.
a. ras proto-oncogene was inactivated, resulting in no tumor formation
b. the arising cancer cells shed or inactivated the tumor suppressor genes, hence cells did not form tumors.
c. mitogenic growth factors were removed, hence cells did not proliferate uncontrollably.
6. Carcinogenic agents target Gl phase of the cell cycle because
-----
a. Gl is the first phase of the cell cycle
b. the following S phase is where
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