What causes the rhythmic change in cyclin concentration in the cell cycle?
A) The changing ratio of cytoplasm to genome
B) The cascade of increased production once the protein is phosphorylated by Cdk
C) An increase in production of a Cdk once the restriction point is passed
D) Its destruction by an enzyme phosphorylated by the cyclin-Cdk complex
E) The binding of PDGF to receptors on the cell surface

Question

Quizplus · Accepted Answer

Cyclin concentration in the cell cycle undergoes rhythmic changes primarily due to its targeted destruction by enzymes that are activated by the cyclin-Cdk complex. This process ensures that cyclins, which are crucial for the progression through different phases of the cell cycle, are present in the right amounts at the right times.

What Causes the Rhythmic Change in Cyclin Concentration in the Cell