What usually occurs during the G1 phase of the cell cycle?

• A. DNA replication
• B. Chromosome segregation
• C. Cell growth and preparation for DNA synthesis
• D. Cytokinesis

Answer: (C)

Verified step by step guidance

1. Understand the cell cycle: The cell cycle consists of several phases, including G1, S, G2, and M phases. Each phase has specific functions and processes.
2. Identify the G1 phase: The G1 phase is the first stage of the interphase in the cell cycle, occurring right after cell division (mitosis).
3. Recognize the main activities in the G1 phase: During the G1 phase, the cell grows in size and synthesizes various enzymes and nutrients that are required for DNA replication and cell division.
4. Differentiate G1 from other phases: Unlike the S phase, where DNA replication occurs, the G1 phase focuses on cell growth and preparation for the upcoming DNA synthesis.
5. Conclude the function of the G1 phase: The primary role of the G1 phase is to ensure the cell is ready for DNA synthesis by increasing in size and producing necessary cellular components.