Cell Cycle: Phases and Checkpoints · Zoology

Which cyclin is primarily associated with mitosis?

  1. Cyclin D, active in early G1
  2. Cyclin E, active at G1/S
  3. Cyclin A, active in S phase
  4. Cyclin B
Show answer and explanation

Correct answer: Cyclin B

Cyclin B associates with CDK1 to trigger entry into mitosis. Its degradation is essential for exit from mitosis.

Difficulty: Medium Question 12 of 20

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