Identify all the false statements. 1. CDK's confer target specificity to cyclin / CDK activity. 2. Cyclins activate CDKs. 3. Only one cyclin is required per cell cycle. 4. CDK's are destroyed by the ubiquitination apparatus. 5. The concentration of a CDK changes less than a cyclin during a cell cycle. Group of answer choices

The false statement (s) is option (3).

That is,

Only one cycling is required per cell cycle 'is false'

Explanation:

Cyclins combine with Cyclin-Dependent protein kinase (CDKs) to form a complex cyclin-CDKs.

This complex comprise so many cyclin, per cycle. This shows that it is a false statement that only one cyclin is required per cell cycle.

The name "Cyclins" came up because they undergo a constant cycle of synthesis and degradation during cell division. When cyclins are synthesized, they act as an activating protein and bind to Cdks forming a cyclin-Cdk complex.

This complex then acts as a signal to the cell to pass to the next cell cycle phase.

After a particular phase, the cyclin degrades, deactivating the Cdk, thus signaling exit from a the phase.