Final answer:
Viruses, like HPV, can cause cancer by interfering with genes that regulate cell growth. HPV can lead to cervical cancer in females, while hepatitis B virus can cause liver cancer.
Step-by-step explanation:
Viruses can be associated with cancer through their ability to affect cell growth and regulation. Certain viruses, like Human Papilloma Virus (HPV), can cause cancer by interfering with the expression of genes that inhibit cell growth or by introducing genes that stimulate unregulated cell growth. HPV, for example, can lead to cervical cancer in females. Other viruses, such as hepatitis B virus, can cause liver cancer. By understanding how viruses can contribute to cancer development, researchers can develop strategies to prevent or treat virus-related cancers.