Activated G,
Cyclin/CDK
Complex
G, Cyclin
CDK
G₁
CDK
S
CDK
G₂
CDK
Mitosis
Mitotic
Cyclin
Activated Mitotic
Cyclin/CDK Complex
Degraded
Mitotic Cyclin
The diagram above depicts how the eukaryotic cell cycle is regulated by
cyclins and cyclin-dependent kinases (CDKs).
Based on the diagram, which of the following best describes the effect of
a toxin that prevents the production of the G₁ cyclin?
Choose 1 answer:
The transition into mitosis would be blocked, causing the cell to
stop dividing.
The cell cycle checkpoints would be ignored, causing the cell to
become cancerous.
DNA replication would be inhibited, causing the cell to stop
dividing.
The mitotic cyclin would functionally replace G1 cyclin, allowing
the cell to continue dividing normally.