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Cyclin dependent kinases are activated by which of the following?

(a) Binding to cyclin

(b) Binding to cyclin and CDK activating protein kinases

(c) Phosphorylation with CDK activating kinase

(d) Phosphorylation with tyrosine kinase

This question was addressed to me in an interview for job.

This interesting question is from Cell Cycle in section Cell Structure and Functions of Life Sciences

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The correct option is (b) Binding to cyclin and CDK activating protein kinases

Easiest explanation: The activation of CDK is triggered by the association of cyclin and phosphorylation with associated kinases. Kinases are the enzymes which add a phosphate group to the target substrate.

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