Which trio lists the possible cellular responses after ionizing radiation exposure?

Which trio lists the possible cellular responses after ionizing radiation exposure?

• A. Cell death, cell mutation, and becoming radioactive
• B. Cell death, cell mutation, and complete cellular repair
• C. Cell death, complete cellular repair, and carcinogenesis
• D. Cell mutation, complete cellular repair, and division

Answer: (B)

Ionizing radiation damages cellular DNA, especially causing breaks in the DNA strands. The cell can respond in three main ways: it can repair the damage and return to full function; it can die if the damage is too severe to fix; or it can fix the damage in an error-prone way, leading to mutations. These represent the primary immediate cellular outcomes after exposure. The option that lists death, mutation, and complete repair best captures these possibilities: the cell may die, acquire mutations, or repair itself completely. Saying a cell becomes radioactive isn’t biologically possible, and carcinogenesis is a potential long-term consequence of mutations rather than an immediate cellular response. Division isn’t a guaranteed immediate outcome after radiation because cells often arrest or die before they can divide.

Ionizing radiation damages cellular DNA, especially causing breaks in the DNA strands. The cell can respond in three main ways: it can repair the damage and return to full function; it can die if the damage is too severe to fix; or it can fix the damage in an error-prone way, leading to mutations. These represent the primary immediate cellular outcomes after exposure. The option that lists death, mutation, and complete repair best captures these possibilities: the cell may die, acquire mutations, or repair itself completely. Saying a cell becomes radioactive isn’t biologically possible, and carcinogenesis is a potential long-term consequence of mutations rather than an immediate cellular response. Division isn’t a guaranteed immediate outcome after radiation because cells often arrest or die before they can divide.