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Cell Cycle Phases and Regulation
Worksheet
Grade Level
Biology
10.47 Cell Cycle Phases and Regulation
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A researcher observes that cells exposed to DNA-damaging radiation spend much longer in G1 than untreated cells. What does this best demonstrate?
A
Cells always divide faster after DNA is damaged.
B
Cell-cycle progression can pause in response to DNA damage.
C
G1 is the phase when sister chromatids separate.
D
Radiation directly completes cytokinesis for the cell.
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