Multiple Choice
During which phase of the eukaryotic cell cycle is DNA replicated, resulting in duplication of each chromosome?
39
views
16. Cell Division
DNA Replication
Multiple Choice
During S phase of the eukaryotic cell cycle, what major event occurs in preparation for cell division?
A
The cell undergoes cytokinesis, physically splitting into two daughter cells.
B
The cell performs most of its growth and normal metabolic functions without DNA replication.
C
The nuclear envelope breaks down and chromosomes align at the metaphase plate.
D
The cell replicates its DNA, producing sister chromatids for each chromosome.
Verified step by step guidance1
Identify the phase of the cell cycle in question, which is the S phase (Synthesis phase) of the eukaryotic cell cycle.
Recall that the main purpose of the S phase is DNA replication, where the cell duplicates its entire genome to ensure each daughter cell receives a complete set of chromosomes.
Understand that during this phase, each chromosome is copied to produce two identical sister chromatids connected at the centromere.
Recognize that this DNA replication prepares the cell for the subsequent phases of mitosis, where sister chromatids will be separated into daughter cells.
Note that other events like cytokinesis, cell growth, or chromosome alignment occur in different phases (cytokinesis after mitosis, growth in G1, alignment in metaphase), so they are not the major event of S phase.
Related Videos
Related Practice
