How does radiation help treat cancer?

How does radiation help treat cancer?

• A. It cools down the cancer cells and weakens them.
• B. It cools down the non-cancerous cells and strengthens them.
• C. It heats up the cancer cells and weakens them.
• D. It heats up the non-cancerous cells and strengthens them.

Answer: (C)

The key idea being tested is how radiation affects cancer cells to stop their growth. Radiation therapy uses high-energy waves or particles to damage the DNA inside cells. This DNA damage makes it hard for cells to repair themselves, so the cancer cells can’t divide and eventually die. While heating cancer cells (thermal therapy) can be used in some treatment strategies to make tumors more susceptible to radiation, the main action of standard radiation therapy is DNA damage, not heat. The option describing heating cancer cells and weakening them best aligns with the general goal of radiation—reducing a cancer cell’s ability to survive and multiply—even though heat isn’t the primary mechanism in typical use. The other ideas, like cooling cells or strengthening them, don’t reflect how radiation helps treat cancer.

The key idea being tested is how radiation affects cancer cells to stop their growth. Radiation therapy uses high-energy waves or particles to damage the DNA inside cells. This DNA damage makes it hard for cells to repair themselves, so the cancer cells can’t divide and eventually die. While heating cancer cells (thermal therapy) can be used in some treatment strategies to make tumors more susceptible to radiation, the main action of standard radiation therapy is DNA damage, not heat. The option describing heating cancer cells and weakening them best aligns with the general goal of radiation—reducing a cancer cell’s ability to survive and multiply—even though heat isn’t the primary mechanism in typical use. The other ideas, like cooling cells or strengthening them, don’t reflect how radiation helps treat cancer.