Lamellae of chloroplast are known as :-

Options

A. Granum
B. Frets
C. Thylakoids
D. Stroma lamellae

Answer

To answer the question "Lamellae of chloroplast are known as:", we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding Chloroplast Structure**:
- Chloroplasts are organelles found in plant cells that are responsible for photosynthesis. They contain various structures, including thylakoids, stroma, and lamellae.

2. **Identifying the Options**:
- We have four options to consider:
1. Granum
2. Frat
3. Thylakoids
4. Stromal amylae

3. **Evaluating Each Option**:
- **Option 1: Granum**:
- Granum refers to a stack of thylakoids. While granum is related to thylakoids, it is not the correct term for lamellae.
- **Option 2: Frat**:
- This term does not accurately describe any structure within chloroplasts. It is not a recognized term in chloroplast biology.
- **Option 3: Thylakoids**:
- Thylakoids are indeed the membrane-bound compartments within chloroplasts where the light reactions of photosynthesis occur. They can be referred to as lamellae because they are flat, membrane-like structures.
- **Option 4: Stromal amylae**:
- This term refers to starch granules found in the stroma of chloroplasts. It does not relate to the lamellae.

4. **Conclusion**:
- The correct answer is **Thylakoids**, as they are the structures that can be referred to as lamellae within the chloroplast.

### Final Answer:
**Thylakoids**