During which phase(s) of the cell cycle does the amount of DNA in a cell remain at the 4C level if the initial amount is denoted as 2C?
Correct answer: D. G2 and M
- A. G0 and G1
- B. G1 and S
- C. Only G2
- D. G2 and M
Explanation
The G2 phase holds the maximum 4C DNA content. The M phase (mitosis) also maintains the 4C DNA level throughout prophase, metaphase, and anaphase because the chromosomes separate but the cell has not yet fully divided (cytokinesis). The content drops back to 2C only after cytokinesis is complete. Thus, Option D is correct. Other options included G1, which has 2C, or G0, which also contains 2C.
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