Understanding Cancer: The Stepwise Breakdown of Normal Cell Regulatory Processes.

4. Cancer is usually caused bya. a cancer virus.b. an inherited oncogene.c. the stepwise breakdown of normal cell regulatory processes.d. X rays.

c. the stepwise breakdown of normal cell regulatory processes

The correct answer is C – the stepwise breakdown of normal cell regulatory processes.

Cancer is the result of uncontrolled cell growth and division, leading to the formation of a tumor. This uncontrolled growth and division is typically caused by changes or mutations in the DNA of cells that regulate normal cell growth and division. These mutations can be caused by a variety of factors, including exposure to environmental toxins like tobacco smoke or radiation, genetic risks, or simply random errors that occur during cell replication.

While certain viruses have been shown to increase the risk of cancer, no single virus has been identified to be the cause of all cancers. Inherited oncogenes – genes that have the potential to cause cancer – can also increase the risk of cancer, but most cancers do not have a strong genetic component. X-rays can increase the risk of cancer, but are not typically the primary cause of cancer development.

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