Identify the correct sequence of cell cycle.

Options

A. `G2 to M to G1 to S`.
B. `S to G2 to M to G1`
C. `G1 to S to G2 to M`
D. `M to G1 to S to S2`

Answer

To identify the correct sequence of the cell cycle, we need to understand the different phases involved. The cell cycle consists of several stages that a cell goes through as it grows and divides. Here’s the step-by-step breakdown:

### Step-by-Step Solution:

1. **G1 Phase (Gap 1 Phase)**:
- The cell is metabolically active and grows in size.
- It synthesizes various proteins and organelles necessary for DNA replication.

2. **S Phase (Synthesis Phase)**:
- During this phase, DNA replication occurs.
- Each chromosome is duplicated, resulting in two sister chromatids for each chromosome.

3. **G2 Phase (Gap 2 Phase)**:
- The cell continues to grow and prepares for division.
- Protein and RNA synthesis occurs, ensuring the cell has all the necessary components for mitosis.

4. **M Phase (Mitosis Phase)**:
- This is the phase where actual cell division occurs.
- The cell divides into two daughter cells, each with a complete set of chromosomes.

### Correct Sequence:
The correct sequence of the cell cycle is:
- G1 → S → G2 → M

### Answer:
The correct answer is option number 3: G1, S, G2, M.

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