Multiple Choice
During what phase of the cell cycle does the cell primarily grow?
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11. Cell Division
Introduction to the Cell Cycle
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In what phase of the cell cycle does DNA replication take place?
A
S phase
B
G1 phase
C
M phase
D
G2 phase
Verified step by step guidance1
Understand the cell cycle: The cell cycle is divided into several phases, including G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has specific functions in the process of 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 a complete set of genetic material. This process is tightly regulated and occurs during a specific phase of the cell cycle.
Identify the S phase: The S phase, or Synthesis phase, is the part of the cell cycle where DNA replication occurs. During this phase, the cell synthesizes a complete copy of its DNA, preparing for cell division.
Eliminate other phases: G1 phase is primarily for cell growth and preparation for DNA synthesis, G2 phase is for preparation for mitosis, and M phase is for mitosis and cytokinesis. None of these phases involve DNA replication.
Conclude that DNA replication takes place during the S phase of the cell cycle, as this is the phase dedicated to synthesizing new DNA.
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