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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Step 1: At the G1 checkpoint, the cell may exit the cell cycle and enter nondividing. 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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4. Match the checkpoint with their respective role in the cell cycle: A. All the options bellow are all checkpoints in the cell cycle. B. The G1 checkpoint checks that the integrity of the DNA before synthesizing a copy of it. C. The metaphase checkpoint determines if all chromosomes are attached to the spindle apparatus. D. Cytokinesis checks the formation of cleavage furrow to separate the cells. E. The G2 checkpoint checks for DNA damage and determines if all of the DNA is fully replicated.
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At which of the cell-cycle checkpoints do external forces have the greatest influence? a. G1 checkpoint b. G2 checkpoint c. M checkpoint d. Go checkpoint
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