When Tumor Cell DNA Is Examined from People at Different

question 5

Multiple Choice

When tumor cell DNA is examined from people at different stages of the same cancer type,mutations that are common to all of them

• A) act early in the disease.
• B) act late in the disease.
• C) acted on an initial cell and then reverted to wild type.
• D) entered the cells on the same type of virus.
• E) are there by coincidence and do not mean anything about the disease.

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