Stroma lamellae membrane lacks

Options

A. PS I only
B. PS II only
C. PS I and electron carriers
D. PS II and NADP reductase

Answer

### Step-by-Step Solution:

1. **Understanding Stroma Lamellae**: Stroma lamellae are the structures in chloroplasts that connect different thylakoid stacks (grana). They play a crucial role in the photosynthetic process.

2. **Identifying Components of Stroma Lamellae**: The stroma lamellae contain Photosystem I (PS I) but do not contain Photosystem II (PS II). PS I is associated with the P700 pigment, while PS II is associated with the P680 pigment.

3. **Analyzing the Options**:
- **Option 1**: PS I only - This is incorrect because PS I is present in stroma lamellae.
- **Option 2**: PS II only - This is also incorrect because PS II is absent in stroma lamellae.
- **Option 3**: PS I and electron carrier - This is incorrect because PS I is present, but the electron carriers are also present.
- **Option 4**: PS II and NADP reductase - This is correct because both PS II and NADP reductase are absent in stroma lamellae.

4. **Conclusion**: The correct answer is that the stroma lamellae membrane lacks Photosystem II (PS II) and NADP reductase.

### Final Answer:
The stroma lamellae membrane lacks Photosystem II (PS II) and NADP reductase.

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