Which of the following statements is TRUE?
A)All types of cancer are associated with a transforming retrovirus.
B)Breast cancer patients whose tumors express elevated levels of ErbB2 usually have a longer median survival after diagnosis than those with normal levels of this protein.
C)Retrovirus-associated oncogenes are often related to the oncogenes found in increased copy numbers in non-virally induced tumor cells.
D)Patients with bladder cancer often have reduced levels of H-Ras expression.
E)None of the above.

Question

Quizplus · Accepted Answer

Retrovirus-associated oncogenes often share similarity with cellular oncogenes, which can be found in increased copy numbers in tumor cells not caused by viruses. This reflects the common mechanisms of oncogene activation in cancer, whether virally induced or not.

Which of the Following Statements Is TRUE