Interphase is the longest stage of the cell cycle and is divided into three phases:

* G1 phase (First Gap): This is the period of growth and normal metabolic activity. The cell produces proteins and organelles, and increases in size.

* S phase (Synthesis): This is the phase where the cell replicates its DNA. This ensures that each daughter cell receives a complete set of genetic information.

* G2 phase (Second Gap): This is a period of further growth and preparation for cell division. The cell synthesizes proteins that are essential for mitosis.

So, the answer is: All of the above (G1, S, and G2 phases) are part of Interphase.