Final answer:
Cancerous tissue can indeed serve as a primary cell line for viral culture, with the HeLa cell line being a prime example. These cells lack normal regulatory junctions and continue to divide, providing a steady environment for viral growth.
Step-by-step explanation:
It is true that cancerous tissue can serve as a primary cell line for viral culture. Tumor tissues represent transformed cell lines; the most well-known is the HeLa cell line, derived from human cervical cancer cells. These cancer cells continue to grow and divide even when they reach confluence, unlike normal cells which exhibit contact inhibition. This characteristic makes them suitable for viral culture studies because they provide a consistent and reliable source for viruses to infect and replicate within.
Notably, cancer cells lack certain communication mechanisms like gap junctions and have fewer cadherins and integrins, which explains why they don't exhibit contact inhibition and are often used for long-term cultures in laboratories.