Answer
The longest phase of the cell cycle is Interphase
The shortest phase of the cell cycle is the Mitotic phase
Explanation
In case of cells with a nucleus, the stages of the cycle are divided into two phases: Interphase and the Mitotic (M) phase.
During Interphase the cell grows and makes a copy of its DNA before moving into Mitosis.
During Mitotic phase the cell separates its DNA into two sets to create two genetically identical daughter cells.
