During which phase(s) of cell cycle, amount of DNA in a cell remains at 4 C level if the initial amount is…

During which phase(s) of cell cycle, amount of DNA in a cell remains at 4 C level if the initial amount is denoted as 2C?
  1. $G_{0}$ and $G_{1}$
  2. $G_{1}$ and $S$
  3. $G_{2}$
  4. $G_{2}$ and $M$

Solution

Explanation for the correct option:
1. At certain points during M-phase, both \(4 C\) and \(2 C\) DNA is present.
2. The S phase occurs when the amount of DNA in the cell doubles.
3. As a result, the amount of DNA present in the \(G 2\) phase is 4 C.
4. The cell's contents have been doubled, preparing it for further mitotic division.
5. Interphase is made up of the G1 phase (cell growth). S phase (DNA synthesis), and G2 phase (cell growth).
6. At the completion of the interphase, the mitotic phase begins, which consists of mitosis and cytokinesis and results in the production of two daughter cells.

Asked in: NEET 2014

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