Question

What requires 2 inhibitory phosphates to be removed by Cdc25?

A) Cyclin-Dependent Kinase (CDK)
B) Checkpoint Kinase (Chk)
C) Cyclin
D) DNA Ligase

Answer 1

The correct answer is A) Cyclin-Dependent Kinase (CDK). Cdc25 removes inhibitory phosphates from CDKs' complex, enabling them to become fully active and advance the cell cycle past a checkpoint.

Step-by-step explanation:

The correct answer is A) Cyclin-Dependent Kinase (CDK).

Cdc25 is a protein phosphatase that removes inhibitory phosphates from CDKs’ complex. CDKs must be activated by binding to cyclin and phosphorylated by another kinase. The removal of the inhibitory phosphates by Cdc25 enables the CDK/cyclin complex to become fully active and advance the cell cycle past a checkpoint.