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Multiple Choice
During which phase of the cell cycle is cell growth most significant?
A
G2 phase
B
G1 phase
C
S phase
D
M phase
Verified step by step guidance
1
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 purpose of each phase: The G1 phase is primarily for cell growth, the S phase is for DNA replication, the G2 phase is for preparation for mitosis, and the M phase is for mitosis itself.
Focus on the G1 phase: During the G1 phase, the cell grows in size and synthesizes mRNA and proteins that are required for DNA synthesis. This is the phase where the cell increases its volume and prepares for DNA replication.
Compare with other phases: In the S phase, the cell's focus is on replicating its DNA, not on growth. The G2 phase involves further preparation for mitosis, and the M phase is where cell division occurs.
Conclude that the G1 phase is where cell growth is most significant, as this is when the cell increases in size and prepares the necessary components for DNA replication and subsequent cell division.