11. Cell Division
Cell Cycle Regulation
11. Cell Division
Cell Cycle Regulation
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Practice this topic
- Multiple Choice
Checkpoints within the cell cycle:
- Multiple Choice
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 ________.
a) Telophase.
b) Prophase.
c) G2.
d) Metaphase.
- Multiple Choice
Which of the following cell cycle checkpoints ensures that the genetic material is fully replicated before mitosis?
- Multiple ChoiceTissue culture experiments with PDGF demonstrate that without this substance, __________.
- Open QuestionProgression through the cell cycle is regulated by oscillations in theconcentration of which type of molecule?a. p53, Rb, and other tumor suppressorsb. receptor tyrosine kinasesc. cyclinsd. cyclin-dependent kinases
- Open QuestionThe decline of MPF activity at the end of mitosis is due toa. the destruction of the protein kinase Cdk.b. decreased synthesis of Cdk.c. the degradation of cyclin.d. the accumulation of cyclin.
- Open QuestionWhich 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
- Open QuestionApoptosis involves all but which of the following?a. fragmentation of the DNAb. cell-signaling pathwaysc. lysis of the celld. digestion of cellular contents by scavenger cells