During what portion of the cell cycle does interphase occur?

Question

BlackTom AI · Accepted Answer

Interphase is the phase of the cell cycle during which the cell grows and replicates its DNA in preparation for mitosis. 
Option 1: G1 only. This is incomplete because interphase includes more than just the G1 phase; cells also spend time in S and G2 during interphase. 
Option 2: S only. While DNA replication occurs in S phase, interphase as a whole comprises G1, S, and G2, not just S. 
Option 3: G1 and G2. This misses the S phase, where DNA synthesis occurs, which is a key part of interphase. 
Option 4: G1, S, and G2. This is the correct description of interphase, as it includes all three preparatory stages before mitosis (M phase).

During what portion of the cell cycle does interphase occur? 单项选择题

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