With regards to mitosis, which checkpoint is considered the most important?
BIOLOGY
SAT 2021
With regards to mitosis, which checkpoint is considered the most important?
- A. G2
- B. S
- C. M
- D. G1
Correct Answer: D. G1
Explanation
G1 is considered to be the most important checkpoint in the cell cycle. G1 precedes S and G2, so it decides if the cell is ready to commit the resources to go through the S phase, G2 phase, M phase, and then finally division. S is crucial for the replication of cellular materials and the duplication of DNA, but if the cell cannot pass G1, then it will never reach S phase.
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