High-energy radiation is often used to treat cancer. The radiation kills the cancerous cells, and the cell cycle checkpoint for DNA repair is overwhelmed. Radiation
a. causes apoptosis at the S and G2 checkpoints.
b. inhibits the growth factor at the restriction point.
c. blocks DNA replication.
d. only causes apoptosis at the tumor site.
e. kills all tumor cells without harm to healthy cells.
Ans: a. causes apoptosis at the S and G2 checkpoints.
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