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Multiple Choice
In a typical proliferating eukaryotic cell, which phase of the cell cycle is usually the longest?
A
S phase only
B
Interphase
C
G2 phase only
D
M phase (mitosis and cytokinesis)
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1
Understand the phases of the eukaryotic cell cycle: G1 phase (cell growth), S phase (DNA synthesis), G2 phase (preparation for mitosis), and M phase (mitosis and cytokinesis).
Recognize that Interphase includes G1, S, and G2 phases, during which the cell grows and duplicates its DNA, but does not divide.
Recall that M phase is the shortest phase, involving actual cell division.
Identify that among the phases, G1 is typically the longest part of Interphase, making Interphase the longest overall phase.
Conclude that since Interphase encompasses the majority of the cell cycle time, it is the longest phase in a proliferating eukaryotic cell.