Which of the Following Statements About Cancer Is Not True

Multiple Choice

Which of the following statements about cancer is not true?

A) Cancer is very often associated with problems at the G₁ checkpoint.
B) For a tumor to be defined as "cancer," it must first metastasize.
C) Cancer cells often have a defective form of the tumor repressor p53.
D) Many cancer cells have defective forms of the signal transduction protein Ras that do not become deactivated.