All Cell Cycle Checkpoints are Similar in Which Way

Question

All cell cycle checkpoints are similar in which way?
A)They respond to the same cyclins.
B)They utilize the same Cdks.
C)They give the go-ahead signal to progress to the next checkpoint.
D)They each have only one cyclin/Cdk complex.
E)They activate or inactivate other proteins.

Accepted Answer

All cell cycle checkpoints activate or inactivate other proteins, such as tumor suppressor proteins and DNA repair enzymes, in order to ensure proper cell cycle progression and prevent damaged or abnormal cells from dividing. The other statements are not true for all checkpoints. For example, different checkpoints respond to different cyclins and utilize different Cdks. Additionally, not all checkpoints give the go-ahead signal to progress to the next checkpoint.