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Multiple Choice
What happens if a cell does not pass the G1 checkpoint during the cell cycle?
A
The cell duplicates its organelles and prepares for cytokinesis.
B
The cell immediately proceeds to mitosis.
C
The cell undergoes apoptosis or enters a resting state known as G0.
D
The cell enters the S phase and begins DNA replication.
Verified step by step guidance
1
Understand the role of the G1 checkpoint: The G1 checkpoint is a critical control point in the cell cycle where the cell assesses whether it has the necessary resources and conditions to proceed with DNA replication and division.
Identify the consequences of not passing the G1 checkpoint: If a cell does not meet the requirements at the G1 checkpoint, it will not proceed to the S phase where DNA replication occurs.
Explore the options for a cell that does not pass the G1 checkpoint: The cell may enter a resting state known as G0, where it remains metabolically active but does not divide, or it may undergo apoptosis, which is a programmed cell death process.
Differentiate between G0 and apoptosis: G0 is a reversible state where the cell can re-enter the cell cycle if conditions improve, while apoptosis is an irreversible process leading to cell death.
Conclude the correct outcome: Based on the options provided, the correct answer is that the cell undergoes apoptosis or enters a resting state known as G0 if it does not pass the G1 checkpoint.