問題詳情
18. Which of the following statements describes proto-oncogenes?
(A)Their normal function is to suppress tumor growth.
(B)They are introduced to a cell initially by retroviruses.
(C) They are produced by somatic mutations induced by carcinogenic substances.
(D)They often encode proteins that stimulate the cell cycle.
(E)They are underexpressed in cancer cells.
(A)Their normal function is to suppress tumor growth.
(B)They are introduced to a cell initially by retroviruses.
(C) They are produced by somatic mutations induced by carcinogenic substances.
(D)They often encode proteins that stimulate the cell cycle.
(E)They are underexpressed in cancer cells.
參考答案
無參考答案
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