Identify the phase at which most organelles duplicates.

• A. M phase
• B. G₁ phase
• C. G₀ phase
• D. G₂ phase

The phase during which most organelles duplicate is the G₂ phase. This phase occurs after DNA replication in the S phase and before the cell enters mitosis (M phase). During G₂, the cell prepares for division by producing the necessary proteins and duplicating organelles to ensure that both daughter cells receive the required components.

Key Points about Cell Cycle Phases

• M Phase: The phase of mitosis where cell division occurs.
• G₁ Phase: The first gap phase where the cell grows and synthesizes proteins.
• G₀ Phase: A resting state where cells are not actively preparing to divide.
• G₂ Phase: The second gap phase focused on organelle duplication and preparation for mitosis.

In summary, the correct answer is D. G₂ phase, as it is crucial for ensuring that the cell is ready for successful division.