Multiple Choice
Examine the figure below.In a typical colon cancer,the first step is ________. 
A) the inactivation of a tumor-suppressor gene
B) the mutation of a tumor-suppressor gene, producing an oncogene
C) the mutation of a proto-oncogene, producing an oncogene
D) the conversion of an oncogene to a tumor-suppressor gene
Correct Answer:

Verified
Correct Answer:
Verified
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