The cell cycle normally stops within the G1 phase of interphase unless the cell receives a go-ahead signal via certain control proteins. If that signal never arrives, the cell will switch into a permanently nondividing state. Select one:
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The cell cycle normally stops within the G1 phase of interphase unless the cell receives a go-ahead signal via certain control proteins. If that signal never arrives,
the cell will switch into a permanently nondividing state.
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- Why is cell furrowing important in cell division? If cytokinesis did not occur, what would be the end result?The cell cycle is highly regulated and involves many steps to ensure that a cell is ready to divide. For this reason, cells cycle between interphase and mitosis. Which of the following describes the consequence of a severe disruption of interphase in cells in healthy tissue? Disruption of interphase will have no effect on mitosis because they are two completely independent processes. Disruption of interphase will lead to a faster and more efficient mitotic cycle, which will result in increased cell division and tissue growth. Disruption of interphase will trigger the cell to switch to a mitotic phase and repeatedly divide, which will result in the massive proliferation of the cells and heightened tissue growth. Disruption of interphase will result in the cell being unable to synthesize proteins and organelles required to divide, which will result in the cell not passing key checkpoints and ceasing to divide.Differentiate (in a general sense) cell activities occuring during Interphase and the Mitotic Phase (you could use just 1 word to describe each phase):
- Order the following events of the cell cycle, starting with G1 as the first event. Each answer option should be used once. 1 V[ Choose] G2 phase cytokinesis 2 anaphase S phase metaphase prometaphase G1 phase 3 prophase telophase [ Choose ] [ Choose ] 6 [ Choose ] 7 [ Choose ] 8 [ Choose ] [ Choose ]Describe the cell cycle using the following words: Interphase G1 G2 S phase M phase (mitosis) Prophase Metaphase Anaphase Telophase Cytokinesis Apoptosis Check Points feedbackIn the phase when the cell is not dividing (interphase) is there activity within the cell nucleus?
- These types of proteins are responsible for all the following events during cell division: movement of "chromosomes" to poles, sliding of non-kinetochore microtubules pushing the two ends of the cell apart, and also the production of the cleavage furrow during cytokinesis. They are called _ _ (two words)List in each blank the description of events associated with each stage of mitosis in addition to the preparatory stage Interphase. Some events and structures occur only in plant cells and some in animal cells. Mark these events in the list with an asterisk.The cell cycle is an internally regulated process and not affected by external signals. True or false explain why
- "Agent V" is the name of an anticancer (chemotherapy) drug. This drug works against cancer cells by inhibiting the formation of microtubules in sensitive cells. Consider a cell that is sensitive to agent V (in other words, agent V is effective at stopping growth of this cell). Based on this information, agent V would cause the cell to be frozen at which of the major cell cycle checkpoints (G1, G2 or M checkpoint)? ExplainThe anticancer drug paclitaxel (Taxol), derived from the Pacific Yew, has many effects on mitosis. One of its most powerful effects is that it prevents disassembly of the mitotic spindle, which prevents spindle fibers from shortening. Which phase of mitosis would this directly affect? Why would this stop cell division overall and lead to cell death?(Q) During M-phase of cell cycle, active M-Cdk phosphorylates several target proteins in order to regulate their activities. Identify TWO specific examples of such target proteins that are phosphorylated by active M-Cdk, and explain how each of them affects the cell (i.e. their respective biological significance). i) target protein phosphorylated: _______________________________ Biological Significance: ii) target protein phosphorylated: _______________________________ Biological Significance:
