Question

In the study of cancer, researchers have used different types of cells, different environmental conditions, and different experimental designs. But, all researchers have arrived at the same conclusion. Which conclusion is that? A.Cancer cells stop dividing when they touch. B. Cancer cells are unspecialized cells. C. Cancer cells lack contact inhibition. D. Cancer cells reproduce slowly.

Answer 1

 C. Cancer cells lack contact inhibition. 

Answer 2

Answer: Cancer cells lack contact inhibition. Contact inhibition is a regulatory mechanism of normal cells in which normal cells stops proliferation when they form a single layer (mono-layer). This is a pure anti-cancer mechanism which is escaped by cancerous cells. The cancerous cell keeps on dividing forming a tumor. This is due to evading the cell signaling process and this is a character of cancerous cell.