Multiple Choice
At which phase of the cell cycle do centrioles begin to move apart in animal cells?
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11. Cell Division
Introduction to the Cell Cycle
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Chromosomes are duplicated during which phase of the cell cycle?
A
S phase
B
G2 phase
C
M phase
D
G1 phase
Verified step by step guidance1
Understand the cell cycle: The cell cycle consists of several phases that a cell goes through to divide and produce new cells. These phases are G1, S, G2, and M.
Identify the purpose of each phase: G1 phase is the first gap phase where the cell grows and prepares for DNA replication. S phase is the synthesis phase where DNA replication occurs. G2 phase is the second gap phase where the cell prepares for mitosis. M phase is mitosis where the cell divides.
Focus on DNA replication: Chromosome duplication specifically refers to the replication of DNA, which is a key event in the cell cycle.
Determine the phase for DNA replication: DNA replication occurs during the S phase of the cell cycle. This is when each chromosome is duplicated to ensure that each daughter cell receives an identical set of chromosomes.
Conclude with the correct phase: Based on the understanding of the cell cycle, the phase during which chromosomes are duplicated is the S phase.
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