- A CDK1
- B Aurora B kinase
- C Polo-like kinase 1
- D ATM kinase
Correct answer: B. Aurora B kinase
Explanation: Aurora B kinase phosphorylates histone H3 at Ser10 during mitosis. This is a widely used marker for cells in mitosis in immunofluorescence.
Concept context
Mitosis and meiosis: how cells divide for growth, repair, and reproduction.