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Question:

During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C?

G0andG1

OnlyG2

G2and M

G1and S

Solution:

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 G2 phase the amount of DNA is 4C. These doubled cellular contents prepare the cell to sustain in the further mitotic division. So, the correct answer is option C.