11. Cell Division
Cell Cycle Regulation
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Practice this topic
- Multiple Choice
Checkpoints within the cell cycle:
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The M phase checkpoint ensures that all chromosomes are attached to the mitotic spindle. If this does not happen, cells would most likely be arrested in ________.
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Which of the following cell cycle checkpoints ensures that the genetic material is fully replicated before mitosis?
3512views25rank2comments - Multiple ChoiceTissue culture experiments with PDGF demonstrate that without this substance, __________.1753views1rank
- Textbook Question
Progression through the cell cycle is regulated by oscillations in the concentration of which type of molecule?
a. p53, Rb, and other tumor suppressors
b. Receptor tyrosine kinases
c. Cyclins
d. Cyclin-dependent kinases
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The decline of MPF activity at the end of mitosis is due to
a. The destruction of the protein kinase Cdk
b. Decreased synthesis of Cdk
c. The degradation of cyclin
d. The accumulation of cyclin
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Which of the following occurs during apoptosis?
a. Lysis of the cell
b. Direct contact between signaling cells
c. Fragmentation of the DNA
d. Release of proteases outside the cell
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Apoptosis involves all but which of the following?
a. Fragmentation of the DNA
b. Cell-signaling pathways
c. Lysis of the cell
d. Digestion of cellular contents by scavenger cells
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