Multiple Choice
From which phase of the cell cycle does a cell enter the G0 phase?
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11. Cell Division
Introduction to the Cell Cycle
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What structure holds the duplicated chromosomes together and is also copied during the S phase of the cell cycle?
A
Ribosome
B
Centromere
C
Spindle fiber
D
Nucleolus
Verified step by step guidance1
Understand the context: The question is about the structure that holds duplicated chromosomes together during the cell cycle, specifically in the S phase.
Recall the cell cycle phases: The S phase is where DNA replication occurs, resulting in duplicated chromosomes.
Identify the structure: The centromere is the region of a chromosome where the two sister chromatids are held together after DNA replication.
Differentiate from other structures: Ribosomes are involved in protein synthesis, spindle fibers are involved in chromosome movement during mitosis, and the nucleolus is involved in ribosome production.
Conclude: The centromere is the correct structure that holds duplicated chromosomes together and is copied during the S phase.
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