What is the primary function of the cell cycle?

• A. To control the cell's response to external stimuli
• B. To ensure accurate DNA replication and cell division
• C. To facilitate the transport of molecules across the cell membrane
• D. To regulate the cell's energy production

Answer: (B)

Verified step by step guidance

1. Understand that the cell cycle is a series of events that cells go through as they grow and divide.
2. Recognize that the primary function of the cell cycle is to ensure that cells accurately replicate their DNA and divide into two daughter cells.
3. Learn about the main phases of the cell cycle: interphase (which includes G1, S, and G2 phases) and the mitotic phase (which includes mitosis and cytokinesis).
4. During the S phase of interphase, DNA replication occurs, ensuring that each daughter cell receives an exact copy of the genetic material.
5. The mitotic phase is responsible for the division of the cell's nucleus and cytoplasm, leading to the formation of two genetically identical daughter cells.