Multiple Choice
What protein complex is primarily responsible for controlling the cell cycle at key checkpoints?
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11. Cell Division
Cell Cycle Regulation
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What is the primary purpose of checkpoints in the cell cycle?
A
To verify that the cell's DNA is undamaged and properly replicated
B
To regulate the cell's energy production
C
To determine the cell's size and shape
D
To ensure that the cell has sufficient nutrients before division
Verified step by step guidance1
Understand the cell cycle: The cell cycle is a series of phases that cells go through to grow and divide. It includes interphase (G1, S, G2) and mitotic phase (M phase).
Identify the role of checkpoints: Checkpoints are control mechanisms in the cell cycle that ensure the cell is ready to proceed to the next phase. They help maintain the integrity of the cell's genetic material.
Focus on DNA integrity: One of the primary purposes of checkpoints is to verify that the cell's DNA is undamaged and properly replicated before the cell divides. This prevents the propagation of errors.
Consider other factors: While checkpoints primarily focus on DNA integrity, they also assess other conditions such as cell size, nutrient availability, and energy status to ensure the cell is prepared for division.
Evaluate the options: Given the choices, the most critical function of checkpoints is to verify DNA integrity, as this is essential for maintaining genetic stability and preventing mutations.
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