Which of these statements is FALSE about the role of mutations in cancer. Typically there is a loss of function mutation in a tumor suppressor gene Typically there is a gain of function mutation in a proto-onco gene Typically cells have two or more mutations Typically there is a gain of function mutation in a Tumor Suppressor Gene
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Which of the following statements about tumor suppressor genes is false? Individuals with one copy of a tumor suppressor gene deleted will likely have a higher risk of cancer. Inactivation of tumor suppressor genes leads to enhanced cell survival and proliferation. Their normal function usually helps restrain cell division. Gene amplification of tumor suppressor genes is a common pathway leading to increased cancer risk.
Madhur L.
Of the two classes of genes associated with cancer, tumor-suppressor genes and oncogenes, mutations in which group can be considered gain-of-function mutations? In which group are the loss-of-function mutations? Explain.
Adi S.
(A) Overactivity Mutation (Gain of Function) A single mutation event creates an oncogene in a normal cell. This activating mutation enables the oncogene to promote cell transformation. (B) Underactivity Mutation (Loss of Function) Mutation event inactivates tumor suppressor gene. No effect of mutation in one gene copy. Second mutation event inactivates second gene copy. Two inactivating mutations functionally eliminate the tumor suppressor gene, promoting cell transformation. cells en route to cancer
Sri K.
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