Question

One of the following is incorrect about cancer cells.

• A. They exhibit the property of contact inhibition.
• B. They are metastatic.
• C. They exhibit mass proliferation.
• D. They are produced when cellular oncogenes of normal cells activated.

Answer 1

Answer: (A)

They exhibit the property of contact inhibition.

The cancerous cells develop as an undifferentiated mass of cells. These cells are produced due to activation of the oncogenes. The oncogenes are the genes which stimulate the formation of cancerous tumor. These oncogenes are present in inactivated state in the normal cells. They get activated and forms the cancerous cells. They exhibit the property of mass proliferation in which the cells grow as mass or bulk at the site of growth. They are metastatic. This means that they can get separated from the original site and migrate to other site and start developing in that place. They do not exhibit the property of contact inhibition.

Thus, the correct answer is option A.