Which of the following is called the fret membrane ?

Options

A. Thylakoids
B. Quantasomes
C. Stromal lamellae
D. Grana

Answer

To solve the question "Which of the following is called the fret membrane?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify which option is referred to as the "fret membrane".

2. **Evaluate Option 1: Thylakoids**:
- Thylakoids are membrane-bound compartments inside chloroplasts and cyanobacteria.
- They are involved in the light reactions of photosynthesis.
- **Conclusion**: Thylakoids are not referred to as the fret membrane.

3. **Evaluate Option 2: Quantisomes**:
- Quantisomes are structures found in the thylakoid membrane of chloroplasts.
- They play a role in the photosynthetic process.
- **Conclusion**: Quantisomes are not called the fret membrane.

4. **Evaluate Option 3: Stromal Lamellae**:
- Stromal lamellae are the regions of thylakoid membranes that connect grana (stacks of thylakoids).
- They are often referred to as the "fret membrane".
- **Conclusion**: This option is correct as stromal lamellae are indeed called the fret membrane.

5. **Evaluate Option 4: Grana**:
- Grana are stacks of thylakoids where light reactions of photosynthesis occur.
- **Conclusion**: Grana are not referred to as the fret membrane.

### Final Answer:
The correct answer is **Option 3: Stromal Lamellae**, which is also called the fret membrane.