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Multiple Choice
Which of the following occurs during the S-phase of interphase?
A
Chromosome segregation
B
DNA replication
C
Cell growth
D
Cytokinesis
Verified step by step guidance
1
Understand the cell cycle: The cell cycle consists of interphase and the mitotic phase. Interphase is further divided into G1, S, and G2 phases.
Identify the S-phase: The S-phase, or synthesis phase, is a part of interphase where the cell prepares for division by replicating its DNA.
Differentiate between the options: Chromosome segregation and cytokinesis occur during mitosis, not interphase. Cell growth primarily occurs during the G1 phase.
Focus on DNA replication: During the S-phase, each chromosome is duplicated, resulting in two sister chromatids for each chromosome, which is essential for cell division.
Conclude with the correct process: The key event during the S-phase is DNA replication, ensuring that each daughter cell receives an identical set of chromosomes.