Have you noticed the checkpoints in the illustration of the cell cycle? A checkpoint in the cell cycle is a control point where stop and go signals regulate the cycle. How many checkpoints are there in the cell cycle? a) 2 b) 3 c) 1 d) 4
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Step 1: The cell cycle has three main checkpoints: the G1 checkpoint, the G2 checkpoint, and the M checkpoint. Show more…
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Which of the following statements best describes the occurrence and function of checkpoints during the cell cycle? Multiple Choice Checkpoints occur randomly throughout the cell cycle and help regulate the rate at which the cell moves through the different phases of the cell cycle by allowing it to "jump over" some phases. Checkpoints occur during the G1, G2, and mitotic phases of the cell cycle and help regulate the rate at which the cell moves through the different phases of the cell cycle. Checkpoints occur after each phase of the cell cycle and serve to slow down the rate of cell division by delaying the cell cycle. Checkpoints occur only immediately before and after the S phase of the cell cycle and help speed up the rate of cell division by speeding up the cell cycle.
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Which of the following is NOT an example of how checkpoints internally regulate the cell cycle? a. At the G1 checkpoint, the cell may exit the cell cycle and enter nondividing. b. The M checkpoint is cleared if kinetochores are properly attached to their microtubules. c. PDGF can signal cells to grow and divide d. Passing the G2 checkpoint means the cell is cleared to enter the mitosis phase
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Review the three cell checkpoints of the cell cycle. Why is it important that the cell has these checkpoints (what would be the result if there were no checkpoints?!).
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