Which phase of the cell cycle is primarily responsible for the regulation of cell division?

• A. G2 phase
• B. G1 phase
• C. S phase
• D. M phase

Answer: (D)

Verified step by step guidance

1. Understand the cell cycle: The cell cycle consists of several phases that a cell goes through to divide and produce new cells. These phases include G1, S, G2, and M phase.
2. Learn about the G1 phase: This is the first gap phase where the cell grows and prepares for DNA replication. It is crucial for the regulation of cell size and checks for DNA damage before proceeding to the S phase.
3. Explore the S phase: During this phase, DNA replication occurs, ensuring that each daughter cell will have a complete set of chromosomes.
4. Examine the G2 phase: This is the second gap phase where the cell continues to grow and prepares for mitosis. It checks for DNA damage and ensures all proteins needed for cell division are present.
5. Focus on the M phase: The M phase, or mitosis, is where the actual cell division occurs. It includes the processes of prophase, metaphase, anaphase, and telophase, leading to the formation of two daughter cells. This phase is primarily responsible for the regulation of cell division.