Multiple Choice
Chromosomes are duplicated during which portion of the cell cycle?
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16. Cell Division
DNA Replication
Multiple Choice
In eukaryotic cells, during which phase of the cell cycle does DNA replication occur?
A
M phase (mitosis)
B
S phase (synthesis) of interphase
C
G2 phase of interphase
D
G1 phase of interphase
Verified step by step guidance1
Understand the phases of the eukaryotic cell cycle: G1 phase (first gap), S phase (synthesis), G2 phase (second gap), and M phase (mitosis).
Recall that DNA replication is the process of copying the entire genome to prepare for cell division.
Identify that DNA replication specifically occurs during the S phase, where the cell synthesizes a complete copy of its DNA.
Note that G1 and G2 phases are primarily for cell growth and preparation, while M phase is when the cell actually divides.
Conclude that the S phase of interphase is the correct phase during which DNA replication takes place.
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