Progression Through the Cell Cycle Requires a Cyclin to Bind

question 51

Multiple Choice

Progression through the cell cycle requires a cyclin to bind to a Cdk because

• A)the cyclins are the molecules with the enzymatic activity in the complex.
• B)the binding of a cyclin to Cdk is required for Cdk enzymatic activity.
• C)cyclin binding inhibits Cdk activity until the appropriate time in the cell cycle.
• D)without cyclin binding, a cell-cycle checkpoint will be activated.

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