What is the role of the M checkpoint in the cell cycle? (2023)
Practice Questions
Q1
What is the role of the M checkpoint in the cell cycle? (2023)
To check for DNA damage
To ensure chromosomes are properly aligned
To initiate DNA replication
To signal the end of cytokinesis
Questions & Step-by-Step Solutions
What is the role of the M checkpoint in the cell cycle? (2023)
Step 1: Understand that the cell cycle is the process by which a cell grows and divides.
Step 2: Identify that the M checkpoint occurs during the M phase, which includes mitosis (cell division).
Step 3: Recognize that the M checkpoint specifically checks if all chromosomes are lined up correctly in the middle of the cell (this area is called the metaphase plate).
Step 4: Know that if the chromosomes are not properly aligned, the cell will not move to the next phase (anaphase) until they are correctly positioned.
Step 5: Conclude that the M checkpoint is important for ensuring that each new cell gets the right number of chromosomes.
