A physical, chemical, or biological agent that causes cancer is called

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A carcinogen is any substance, radionuclide, or radiation that promotes carcinogenesis, the formation of cancer. Carcinogens can be physical agents, such as ultraviolet radiation from sunlight, chemical agents like tobacco smoke, or biological agents like viruses. Oncogenes are genes that have the potential to cause cancer, but they are not external agents that cause cancer. Regulatory proteins are proteins that regulate gene expression and cellular processes, but they are not agents that cause cancer.

A Physical, Chemical, or Biological Agent That Causes Cancer Is