During cell cycle, RNA and protein synthesis takes place during:-

Options

A. `G_(1)` and `G_(2)` -phase
B. S - phase
C. M - phase
D. Cytokinesis

Answer

**Step-by-Step Solution:**

1. **Understanding the Cell Cycle:**
- The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), M (Mitosis), and Cytokinesis. Each phase has specific functions and activities.

2. **Identifying the Phases:**
- G1 Phase: This is the first phase after cell division where the cell grows and synthesizes proteins and RNA.
- S Phase: This phase is primarily focused on DNA replication, not RNA or protein synthesis.
- G2 Phase: This is the second gap phase where the cell continues to grow and prepares for mitosis, also involving RNA and protein synthesis.
- M Phase: This phase involves mitosis and the actual division of the cell, where RNA and protein synthesis does not occur.
- Cytokinesis: This is the process of cytoplasmic division following mitosis, not related to RNA or protein synthesis.

3. **Analyzing the Options:**
- Option 1 (G1 and G2 Phase): Correct, as both phases involve RNA and protein synthesis.
- Option 2 (S Phase): Incorrect, as this phase is dedicated to DNA replication.
- Option 3 (M Phase): Incorrect, as this phase is for cell division.
- Option 4 (Cytokinesis): Incorrect, as this is the division of the cytoplasm and does not involve RNA or protein synthesis.

4. **Conclusion:**
- The correct answer is **Option 1 (G1 and G2 Phase)**, as both phases are involved in RNA and protein synthesis during the cell cycle.