Photosynthetic pigments are located on the

Options

A. inner membrane
B. thylakoid membrane
C. thylakoid lumen
D. outer membrane

Answer

To determine where photosynthetic pigments are located, let's analyze the options provided:

1. **Inner Membrane**: The inner membrane of the chloroplast is primarily involved in the transport of materials and does not contain photosynthetic pigments.

2. **Thylakoid Membrane**: The thylakoid membranes are the structures within the chloroplast where photosynthesis occurs. They contain chlorophyll and other pigments that capture light energy for photosynthesis. These thylakoids often stack to form structures called grana, which are connected by stromal thylakoids.

3. **Thylakoid Lumen**: The thylakoid lumen is the internal space of the thylakoid. While it plays a role in the light-dependent reactions of photosynthesis, it does not contain the pigments themselves.

4. **Outer Membrane**: The outer membrane serves as a protective barrier for the chloroplast and does not contain any photosynthetic pigments.

Based on this analysis, the correct answer is:

**Photosynthetic pigments are located on the Thylakoid Membrane.**

### Step-by-Step Solution:
1. **Identify the Structures**: Understand the different parts of the chloroplast (inner membrane, thylakoid membrane, thylakoid lumen, outer membrane).

2. **Analyze Each Option**: Evaluate where photosynthetic pigments are located:
- Inner membrane: No pigments, involved in transport.
- Thylakoid membrane: Contains chlorophyll and other pigments.
- Thylakoid lumen: Contains no pigments, involved in reactions.
- Outer membrane: No pigments, protective role.

3. **Conclusion**: The thylakoid membrane is where photosynthetic pigments are found, making it the correct answer.