객관식
What happens during Gap 1 (G1) of the cell cycle?
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11. Cell Division
Introduction to the Cell Cycle
객관식
In which phase of the cell cycle is DNA copied, resulting in the formation of sister chromatids?
A
G1 phase
B
G2 phase
C
S phase
D
M phase
검증된 단계별 안내1
Understand the cell cycle: The cell cycle consists of several phases that a cell goes through to divide and produce new cells. These phases include G1, S, G2, and M.
Identify the role of each phase: The G1 phase is the first gap phase where the cell grows and carries out normal functions. The S phase is where DNA replication occurs. The G2 phase is the second gap phase where the cell prepares for mitosis. The M phase is where mitosis and cytokinesis occur, leading to cell division.
Focus on DNA replication: DNA replication is a critical process where the cell duplicates its DNA, resulting in two identical sets of chromosomes. This process is essential for the formation of sister chromatids.
Determine when DNA replication occurs: DNA replication takes place during the S phase of the cell cycle. During this phase, each chromosome is duplicated to form sister chromatids, which are identical copies of the original chromosome.
Conclude the answer: Since DNA replication and the formation of sister chromatids occur during the S phase, this is the phase of the cell cycle where DNA is copied.
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