In a typical eukaryotic cell cycle, which phase is generally the longest?

• A. Anaphase
• B. Prometaphase
• C. Interphase
• D. M phase (mitosis and cytokinesis)

Answer: (C)

Verified step by step guidance

1. Understand the main phases of the eukaryotic cell cycle: Interphase and M phase. Interphase includes G1, S, and G2 phases, while M phase includes mitosis and cytokinesis.
2. Recall that Interphase is the period when the cell grows, duplicates its DNA, and prepares for mitosis, whereas M phase is the process of cell division itself.
3. Recognize that Interphase generally takes much longer than M phase because the cell needs time to grow and replicate its DNA accurately.
4. Identify that among the sub-phases of M phase (prophase, prometaphase, metaphase, anaphase, telophase, and cytokinesis), none lasts as long as the entire Interphase.
5. Conclude that Interphase is the longest phase in the typical eukaryotic cell cycle because it encompasses the majority of the cell's life cycle activities before division.