Multiple Choice
In the cell cycle, how many rounds of nuclear division occur during mitosis?
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16. Cell Division
Mitosis
Multiple Choice
During the M phase of the eukaryotic cell cycle, which event occurs?
A
Chromosomes are segregated by the mitotic spindle and the cell divides its cytoplasm during cytokinesis.
B
DNA is replicated to produce identical sister chromatids for each chromosome.
C
The cell repairs DNA damage and prepares for replication by increasing nucleotide pools.
D
The cell grows and synthesizes organelles and proteins needed for DNA replication.
Verified step by step guidance1
Identify the phases of the eukaryotic cell cycle: G1 (growth), S (DNA synthesis), G2 (preparation for mitosis), and M (mitosis and cytokinesis).
Recall that during the M phase, the cell undergoes mitosis, where chromosomes are segregated into two daughter nuclei, followed by cytokinesis, which divides the cytoplasm.
Understand that DNA replication occurs during the S phase, not the M phase, so the statement about producing sister chromatids applies to S phase.
Recognize that DNA repair and nucleotide pool increase happen mainly during G1 and G2 phases, as the cell prepares for DNA replication and mitosis.
Conclude that the defining event of the M phase is the segregation of chromosomes by the mitotic spindle and the division of the cytoplasm during cytokinesis.
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