The longest phase of the cell cycle is the Post mitotic gap phase (Option 1).
- The cell cycle can be divided into two stages: interphase and mitotic (M) phase.
- The interphase can in turn be divided into three different phases: Growth 1 (G1) phase, Synthesis (S) phase, and Growth 2 (G2) phase.
- The G1 phase, also called the first growth phase or post-mitotic gap phase, is generally the longest phase of the cell cycle in which the cell synthesizes all materials (i.e., proteins) required during its division.
- During the next S phase, the genetic material (DNA) is replicated.
In conclusion, the longest phase of the cell cycle is the Post mitotic gap phase (Option 1).
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