Question

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

Answer 1

Answer:

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.

Answer 2

Answer:

Numbers 3) Only one cyclin is required per cell cycle, is false

Explanation:

Cyclins and cyclin-dependent kinases (Cdks) are responsible for modifying target proteins and act in various check points to progress the cell cycle. Four (4) cyclins are involved in this process in the cell cycle.