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Which of the following represents a single cycle within the cell cycle?

  1. Mitotic phase

  2. Interphase

  3. Telophase

  4. G1 phase

The correct answer is: Interphase

Interphase represents a single cycle within the cell cycle because it includes three distinct phases G1, S, and G2. Mitotic phase, or M phase, is the phase that includes mitosis and cytokinesis where the cell divides into two daughter cells. Telophase is a subphase of mitotic phase and is not a single cycle within the cell cycle. G1 phase is the first phase of interphase and is followed by S phase, where DNA replication occurs, and then G2 phase, where the cell prepares for division. Therefore, B: Interphase is the most accurate and complete answer.