DNA is ............, in G $_{2}$ phase of cell cycle.

2 N

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N

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3 N

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4 N

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Solution

The correct option is D $4 N$
A normal cell cycle comprises of interphase and mitosis. The interphase normally comprises of first growth phase (G $_{1}$ phase), synthesis phase (S phase) and second growth phase (G $_{2}$ phase). Because G $_{2}$ phase follows the S phase and precedes the M phase, the DNA content is 4N. Twice the amount of DNA is expected in a cell in G $_{2}$ phase as compared to a cell in G $_{1}$ phase as it has been duplicated during S phase.
So, the correct answer is option A.

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