Which is the correct sequence of phases as the cell enters the cell cycle?

Which is the correct sequence of phases as the cell enters the cell cycle?

• A. G1, S, G2, M
• B. S, G1, G2, M
• C. G1, S, G1, M1
• D. G0, S, G1, M

Answer: (A)

The cell cycle progresses in a precise order: growth and preparation in G1, DNA replication in S, another growth/prep phase in G2, and finally division in M. This makes G1 → S → G2 → M the correct sequence. Starting with G0 would place the cell in a resting state outside active cycling, which isn’t part of the entering cycle. Jumping straight to S or inserting repeated phases disrupts the normal flow, and there isn’t a phase called M1. Mitosis (M) is the final stage where the cell divides.

The cell cycle progresses in a precise order: growth and preparation in G1, DNA replication in S, another growth/prep phase in G2, and finally division in M. This makes G1 → S → G2 → M the correct sequence. Starting with G0 would place the cell in a resting state outside active cycling, which isn’t part of the entering cycle. Jumping straight to S or inserting repeated phases disrupts the normal flow, and there isn’t a phase called M1. Mitosis (M) is the final stage where the cell divides.