Multiple Choice
During anaphase of mitosis, which of the following structures are pulled apart toward opposite poles of the cell?
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11. Cell Division
Introduction to Cell Division
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During which phase of the cell cycle does DNA replication occur?
A
G2 phase
B
G1 phase
C
M phase
D
S phase
Verified step by step guidance1
Understand the cell cycle: The cell cycle consists of several phases, including G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has a specific role in cell growth and division.
Focus on DNA replication: DNA replication is the process by which a cell duplicates its DNA to ensure that each daughter cell receives an identical copy during cell division.
Identify the phase responsible for DNA replication: DNA replication occurs during the S phase (Synthesis phase) of the cell cycle. This is when the cell synthesizes a complete copy of its DNA.
Clarify the roles of other phases: G1 phase is primarily for cell growth and preparation for DNA replication. G2 phase involves preparation for mitosis, and M phase is where the cell divides through mitosis and cytokinesis.
Conclude that the correct answer is S phase: DNA replication is a defining characteristic of the S phase, making it the correct answer to the question.
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