What is the function of oncogenes in cancer?

Oncogenes play a critical role in the development and progression of cancer by promoting cell division and growth. When these genes are mutated or overexpressed, they can lead to unregulated cell proliferation, allowing cells to divide more rapidly than normal. This excessive proliferation can contribute to tumor formation and the progression of cancer.

In normal conditions, oncogenes are involved in various cellular processes, including the regulation of cell growth and division. However, when they become activated through mutations, they can push cells to grow uncontrollably. This is contrasted with tumor suppressor genes, which normally act to inhibit cell division and promote repair mechanisms.

In the context of the choices given, the role of oncogenes as promoters of cell division is crucial in understanding how cancer develops. Cells with activated oncogenes may escape the normal checks and balances that would typically regulate their growth, contributing to cancerous transformations.