Grow cellular effects from exposure to ionizing radiation can include: chromosome breaks, clumping of chromatin, and formation of giant cells or abnormal mitoses. Which option lists all of these?

• A. 1 and 2
• B. 1 and 3
• C. 2 and 3
• D. 1, 2, and 3

Answer: (D)

Ionizing radiation can damage cells in multiple ways, not just one. It directly damages DNA, causing chromosome breaks. It also disrupts the organization of DNA and proteins in the nucleus, leading to clumping of chromatin. When damage is severe, cells may experience mitotic problems, producing giant cells or abnormal mitoses due to failed or erroneous division. Because all three outcomes can occur in irradiated cells, the description that includes chromosome breaks, chromatin clumping, and giant cells or abnormal mitoses matches the full range of radiation-induced cellular effects.