Cyclin dependent kinases which control progression through cell cycle checkpoints are totally activated by which of the following?(a) Binding to cyclin, plus phosphorylation by a Cdk activating protein kinase(b) Binding to cyclins(c) Phosphorylation by Cdk activating protein kinase(d) Phosphorylation by a tyrosine kinaseI had been asked this question in an interview for internship.This intriguing question comes from Regulation of the Cell Cycle by Protein Kinases in section Biosignalling of Biochemistry

Cyclin dependent kinases which control progression through cell cycle

1.	Cyclin dependent kinases which control progression through cell cycle checkpoints are totally activated by which of the following?(a) Binding to cyclin, plus phosphorylation by a Cdk activating protein kinase(b) Binding to cyclins(c) Phosphorylation by Cdk activating protein kinase(d) Phosphorylation by a tyrosine kinaseI had been asked this question in an interview for internship.This intriguing question comes from Regulation of the Cell Cycle by Protein Kinases in section Biosignalling of Biochemistry
Answer» Right choice is (a) BINDING to cyclin, PLUS phosphorylation by a Cdk ACTIVATING protein kinase Explanation: Cyclin DEPENDENT KINASES are totally activated by binding to cyclin and phosphorylation by a Cdk activating protein kinase.

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