First gap phase in cell cycle is :-

Options

A. interval between mitotic phase and DNA replication phase
B. interval between DNA replication phase and Dna separation phase
C. interval between karyokinesis and cytokinesis
D. interval between DNA replication phase and second gap phase

Answer

To answer the question "First gap phase in cell cycle is:", we can follow these steps:

### Step 1: Understand the Cell Cycle
The cell cycle consists of several phases that a cell goes through to divide and replicate. The main phases include Interphase (which is further divided into G1, S, and G2 phases) and the Mitotic phase (which includes mitosis and cytokinesis).

### Step 2: Identify the Phases of Interphase
Interphase is divided into three main phases:
- **G1 Phase (First Gap Phase)**: This is the phase where the cell grows and synthesizes proteins necessary for DNA replication.
- **S Phase (Synthesis Phase)**: This is the phase where DNA replication occurs.
- **G2 Phase (Second Gap Phase)**: This phase occurs after DNA replication and involves further growth and preparation for mitosis.

### Step 3: Determine the First Gap Phase
The first gap phase in the cell cycle is the **G1 Phase**. It occurs after mitosis and before DNA replication.

### Step 4: Review the Options
If there are multiple-choice options provided, we can analyze them:
1. G1 Phase - Correct answer as it is the first gap phase.
2. G2 Phase - Incorrect, as this is the second gap phase.
3. Karyokinesis and Cytokinesis - Incorrect, as these are part of the mitotic phase.
4. Any other phase that is not G1 - Incorrect.

### Conclusion
The first gap phase in the cell cycle is **G1 Phase**.

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