Question

The correct sequence of phases of cell cycle is:

• A. M→G1→G2 →S
• B. G1→G2 →S→M
• C. S→G1→G2→ M
• D. G1→ S→G2→ M

Answer 1

The Correct Option is D

The cell cycle is a series of stages that a cell goes through to divide and produce two daughter cells. Understanding the sequence of the cell cycle phases is crucial for biology students and those preparing for competitive exams.

The correct sequence of phases in the cell cycle is as follows:

1. G₁ phase (Gap 1): This is the first gap phase after a cell divides. During this phase, the cell grows and synthesizes proteins necessary for DNA replication. It's a period of active cell metabolism, where the cell increases its size and prepares for DNA synthesis.
2. S phase (Synthesis): In this phase, the cell replicates its DNA, ensuring that both daughter cells will get a complete set of genetic information. The chromosomes are duplicated here.
3. G₂ phase (Gap 2): Following DNA synthesis, the cell enters another growth phase. During G₂, the cell continues to grow and produce proteins, ensuring all cellular components are ready for mitosis.
4. M phase (Mitosis): This phase involves the division of the cell’s nucleus and cytoplasm. Mitosis ensures that each daughter cell receives an identical set of chromosomes. After mitosis, the cell cycle is complete, and the cell may enter another G₁ phase or pause in the G₀ phase if it becomes quiescent.

Given this information, the correct sequence of the cell cycle phases is:

G₁ → S → G₂ → M

Therefore, the correct option among the ones provided is: G1→ S→G2→ M.