Non pigmented part of chloroplast is called :-

Options

A. Thylakoids
B. Grana
C. Stroma
D. Lamellae

Answer

To answer the question about the non-pigmented part of the chloroplast, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Chloroplasts**: Chloroplasts are the organelles responsible for photosynthesis in plant cells. They contain various structures, including thylakoids, grana, stroma, and lamellae.

2. **Identify the Components**:
- **Thylakoids**: These are membrane-bound compartments inside the chloroplast where the light-dependent reactions of photosynthesis occur. They contain chlorophyll, which gives them a green color.
- **Grana**: These are stacks of thylakoids. They also contain pigments like chlorophyll.
- **Stroma**: This is the fluid-filled space surrounding the thylakoids. It does not contain pigments and is where the light-independent reactions (Calvin cycle) take place.
- **Lamellae**: These are the thin membranes that connect thylakoids.

3. **Determine the Non-Pigmented Part**: Among the components listed, the stroma is the only part that does not contain pigments. It serves as the site for various biochemical processes, including the synthesis of glucose.

4. **Conclusion**: Based on the definitions and functions of the chloroplast components, the non-pigmented part of the chloroplast is the **stroma**.

### Final Answer:
The non-pigmented part of the chloroplast is called **Stroma**.

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