13. Which of the following processes would result from a defective muscle cell that did not complete the process of DNA replication?*1 pointA. The muscle cell will be stopped at G1 checkpoint and sent to G0 phase.B. The cell will get stuck at the spindle checkpoint.C. The G2 checkpoint will stop the cell from continuing the cycle.D. The cell will continue on to cytokinesis.
Question
- Which of the following processes would result from a defective muscle cell that did not complete the process of DNA replication?*1 pointA. The muscle cell will be stopped at G1 checkpoint and sent to G0 phase.B. The cell will get stuck at the spindle checkpoint.C. The G2 checkpoint will stop the cell from continuing the cycle.D. The cell will continue on to cytokinesis.
Solution
The process of DNA replication occurs during the S phase of the cell cycle. If a muscle cell did not complete DNA replication, it would not be able to pass the G2 checkpoint. The G2 checkpoint is a point in the cell cycle at which the cell checks to make sure DNA replication has been completed correctly. If there are any problems, the cell cycle is halted, and the cell attempts to either complete DNA replication or repair the DNA. If these processes are not successful, the cell will not be allowed to proceed into the M phase (mitosis). Therefore, the correct answer is C. The G2 checkpoint will stop the cell from continuing the cycle.
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