Which of the following statements is true? a. The gene product of a proto-oncogene inhibits the cell cycle. b. Proto-oncogenes are mutant versions of oncogenes that cause cancer. c. When mutated tumor suppressor genes lose their function, cancer may result. d. When tumor suppressor genes mutate, they become oncogenes. e. All of these are correct.
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Which of the following statements about cancer is false? (a) Oncogenes arise from mutations in proto-oncogenes. (b) Tumor suppressor genes normally interact with growth-inhibiting factors to block cell division (c) More than 100 oncogenes and 15 tumor suppressor genes have been identified (d) Oncogenes were first discovered in mouse models for cancer (e) The development of cancer is usually a multistep process involving both oncogenes and mutated tumor suppressor genes
Which of the following statements about cancer is false? (a) oncogenes arise from mutations in proto-oncogenes (b) tumor suppressor genes normally interact with growth inhibiting factors to block cell division (c) more than 120 cancer-driving genes have been discovered (d) oncogenes were first discovered in mouse models for cancer (e) the development of cancer is usually a multistep process involving both oncogenes and mutated tumor suppressor genes
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