Question: On the molecular biology of cancer: 
 Options:  <1> Oncogenes are mutated derivatives of normal genes, called protooncogenes, whose function is to promote cell proliferation or survival. <2> Oncogenes are genes that synthesize proteins that inhibit cell proliferation. <3> The tumor suppressor genes synthesize proteins that inhibit cell death. <4> Protooncogenes synthesize proteins that promote cell death. <5> Apoptosis is a form of activation of proto-oncogenes.
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