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During which cell cycle checkpoint does the cell have to determine if the chromo

ID: 176686 • Letter: D

Question

During which cell cycle checkpoint does the cell have to determine if the chromosomes separated properly? G1-S S G2-M M p53 is a transcription factor that is activated by during phase of the cell cycle. methylation; G1 phosphorylation; S carboxylation; G1 phosphorylation; G1 Which of the following cyclins is most active during mitosis? cyclin A cyclin B cyclin C cyclin D Which molecule inactivates mitotic cyclin-CDK. complexes using phosphorylation? Cdc25 Cdc6 Weal Helicase What molecule helps to bring DNA helicase to a DNA molecule that will be replicated? Cdc25 Cdc6 Weal S-CDK Which structure helps anchor the mitotic spindles to the plasma membrane? kinetochore aster centrosome condensing Which of the following does not inhibit the cell cycle? p27 Rb Cdk2

Explanation / Answer

19). D

20). D

21). B

22). C

23). B

24). B

25). C

Cdk2 is a cell cycle progression protein which intiates centrosome duplication.