MCQ on Cell Cycle Checkpoints and its Significance




A cell cycle checkpoint is a regulatory control point in the cell cycle where various signalling pathways assess the fidelity of DNA replication and repair, ensuring that cell division proceeds accurately, preventing the propagation of genetic errors or damaged DNA. This article on Checkpoints of Cell Cycle MCQ will help you to study the intricate mechanism of cell cycle regulation.

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1. 
What is the primary purpose of cell cycle checkpoints?

2. 
At which checkpoint does the cell check for DNA damage and repair it if necessary?

3. 
What molecule is responsible for triggering the progression from G1 phase to S phase?

4. 
Which checkpoint ensures that all chromosomes are properly attached to the spindle fibers before cell division proceeds?

5. 
What happens if a cell fails the G2 checkpoint?

6. 
Which of the following is NOT a role of the G1 checkpoint?

7. 
Which checkpoint is essential for preventing uncontrolled cell division and cancer development?

8. 
What is the role of p53 in the cell cycle checkpoint system?

9. 
Which phase of the cell cycle is the longest in most cells?

10. 
What is the main function of the S checkpoint in the cell cycle?

11. 
What is the role of cyclins in cell cycle regulation?

12. 
Which checkpoint ensures that the cell's DNA has been accurately replicated during the S phase?

13. 
What is the final outcome of a cell that successfully passes through all checkpoints in the cell cycle?

14. 
What is the consequence of a cell cycle checkpoint malfunctioning or being bypassed in a cancerous cell?

15. 
Which protein kinase is a key regulator of the G1 checkpoint in the cell cycle?

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