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 $2$ C?

G_{2}

and M

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G_{0}

and

G_{1}

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G_{1}

and S

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Only

G_{2}

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Solution

The correct option is A $G_{2}$ and M
In M-phase, both 4C and 2C of DNA are present in different stages. S phase marks the period during which the amount of DNA in the cell doubles. Thus, at $G_{2}$ phase the amount of DNA is 4C. These doubled cellular contents prepare the cell to sustain in the further mitotic division.
Thus A is the correct option.

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