AP Biologyhardmcq1 pt
An oncogene is best described as
A.an activated gene that promotes cell growth or survival in a way that can contribute to cancer
B.a gene that always suppresses tumors
C.a virus that infects cells
D.a DNA repair enzyme
Explanation
Core Concept
Oncogenes are activated forms of genes whose increased or inappropriate activity can promote cell growth, proliferation, or survival. They often arise from proto-oncogenes through mutation, gene amplification, chromosomal rearrangement, or overexpression; they are not limited to one specific type of mutation.
Correct Answer
Aan activated gene that promotes cell growth or survival in a way that can contribute to cancer
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