Question
The correct sequence of the cell cycle is-
A. GO-G1-S-G2-M
B. GO-G1-G2-S-M
C. GO-M-G2-S-G1
D. GO-G1-S-M-G2
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Correct Answer » A Explanation |
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Ans.A.
Cell Cycle
- In the G1 (gap 1) phase, the cell prepares for DNA synthesis.
- DNA synthesis occurs during the S (synthesis) phase of the cell cycle. During the S phase, DNA is completely replicated, but only once.
- Cell prepares for mitosis in the G2 (gap 2) phase when proteins necessary for daughter cells are synthesized. Then the cell enters into the M (mitotic) phase when chromosomes are visible under the microscope. The whole cycle lasts about 24 hours; out of which M phase is only 1-2 hours.
- Those cells which are not in the division are said to be in the G0 phase or resting phase.