Multiple Choice
In the context of control of the cell cycle, what is the primary role of cyclins in a cell?
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16. Cell Division
Control of the Cell Cycle
Multiple Choice
In the context of control of the cell cycle, what does the G0 phase represent?
A
The phase in which DNA replication occurs prior to mitosis
B
A checkpoint at the end of G2 that verifies spindle attachment before anaphase begins
C
A quiescent state in which cells have exited the cell cycle and are not actively dividing, but may re-enter the cycle under appropriate signals
D
The stage of mitosis during which sister chromatids separate and move to opposite poles
Verified step by step guidance1
Understand that the cell cycle consists of several phases: G1, S, G2, and M, with checkpoints regulating progression between these phases.
Recognize that the G0 phase is distinct from the active phases of the cell cycle and represents a state where cells are not actively preparing to divide.
Know that cells in G0 have exited the cycle temporarily or permanently and are metabolically active but not progressing through DNA synthesis or mitosis.
Identify that G0 is often called a quiescent or resting phase, where cells can remain for varying lengths of time depending on cell type and external signals.
Understand that cells in G0 can sometimes re-enter the cell cycle if stimulated by appropriate growth factors or environmental cues, resuming division.
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