Question

Suppose a genetic mutation in the Cyclin-dependent kinase (CDK) gene occurs, allowing CDK to be hyperactive (work more efficiently/faster). Suppose nothing else in the cell or environment has changed. What will be the implications of this mutation? Will the cell reproduce faster or slower (explain why)? What is occurring at the Restriction Point to lead to your conclusion?

Answer 1

CDKs allows the cell to transit from one stage of the cell cycle to another.

If CDKs are overexpressed then cells will transit from one stage to another faster. This will lead to faster cell division and more cells in a shorter span of time. CDKs give a signal to the cell to proceed to another stage so if CDKs are more then they will proceed faster from stage to another and cell cycle would end faster.